The Nest is disgraceful trash. Even when functioning, the UI and "learning" is brain-dead and incompetent. Even worse, it's an entire computing device that you're supposed to THROW AWAY WHEN THE BATTERY DIES. Unfuckingbelievable. I have a powered (C-wire) thermostat connection, and I had to trash the Nest because the battery died and the aftermarket batteries all have hideous reviews.
Thank you soooo much!!! I am a single mother, homeowner who has to try to figure out things in my home before calling a handman. And, with your video, I was able to fix my thermostate issue
3am in the morning and I am listening and charging the battery right now. My hubby will be surprise when tomorrow our nest will e working great. ,,, I hope !! Thanks a million for your help
That's rare that I have an issue, search for a video, and the first video I find NAILS the solution. Thanks man for putting this together. Saved my Saturday evening.
I don't generally comment on these videos. However I had a low battery issue and I only needed to do your first step. I didn't even know you could take the face off the thermostat ! Thanks heaps.
Thank you for producing this video . Long story short, I’d been having battery issues. This alternative (to running new wire to add a common, or using the Google Nest Power Connector) seems to have done the trick. Thank you, again, for sharing your knowledge.
I found a charger that would fit my Nest E and that did the trick! I would never have thought to charge the thermostat. Thank you for this very informative video.
We ended up exchanging this model for the slimmer version czcams.com/users/postUgkx0jZ_lGlDVJhDnmagEU8gn47cmfPNlLQU because it was too wide for the only door trim area that made sense to mount it on. However, we should have just noted the dimensions prior to purchasing. Otherwise, we love the doorbell. It works perfectly, and the video is very clear, even at night.
Your video nailed my Nest thermostat failure. I charged the thermostat through its android port with an old android phone charger for 2 hours: instant success. Thermostat came to life, connected with WiFi and everything works great. Thx
Great video and very informative. Here's my pro tip: First thing to do is check to see if one of your kids turned the switch on the furnace to the "off" position... 😅
Thank you for making this video. You saved me money and time. I did the switch out with the green wire and moved it to the c spot on the nest and furnace. No error code now.
I was having problems through the app while away. The temps have been from low 20’s to single digits (and even a few minus degree days) so I decided to stay with my bf and save my fuel. I check my Nest app regularly when I’m not home to make sure everything is ok @ home. Several times I’ve had one (of 2) thermostats show “offline” in the app. Researched the issue & determined that it was likely a low battery. Thanks for the well done video explanation on how to charge the existing battery. I almost bought a new one on Amazon! Good thing I read reviews & one person said better off recharging rather than replacing. I would have taken my unit apart trying to figure this out. THANK YOU 🙏🏻
Oh my goodness, thank you! I had a low battery and have searched to see what the problem was and thanks to your video, I was able to resolve it. I'm guessing like you said, it sat on a shelf for a while because it's a brand new thermostat. Thank you!!!!!!
Thanks from London UK. You got me out of a hole. I recharged it thru my computer. Missing the old days when I just had a clockwork timer that plugged into the wall. Cheers
Thank you so much for this video! I had no idea that my Nest needed charging! Living in Florida, I cringed at the thought of no A/C. I am now going to charge mine for the first time! Thank you again for sharing your knowledge!
One of the best videos I've watched on CZcams. Great job. A friend was having issues so I jumped on here to research the issue. I sent it to him right after the first step... that's how confident I was. Thanks!
Wow, we're going through an insane snow storm in san antonio and our nest was dead! Had no idea if the usb charge! Thank you for doing this!!! You're a blessing!
Thank you so much! Power outage while I was out of town. Came back, and got low battery problem, I recharged it with phone cable, just like you said, and it worked.!!! You are the best!!
Having the same issue… power outage triggered both Nest thermostats to start having battery issue. I can charge via phone cable and that will work for a few hours, then the battery dies again. These worked together fine for 5 years and all the sudden BOTH stop working at the exact same time. Idk what the issue is. Voltage and Lin seem fine.
This video single handedly helped me fix my mother's Nest Learning 2nd gen thermostat when nothing in Google's Nest Troubleshooting site, Nest ProTech Diag pdf, Nest Community forums, or any other Google Search return could. The Event: Heating for past few winter months (NO A/C usage since October 2022). Beautiful day in East Texas, mom turns Nest "Off". Next day, 80°F+ and 95% humidity, mom turns on A/C, and leaves to run a few errands. On arrival home she realizes that it's 78°F in the house. Air Handler blowing air, air not cooled. She calls me, the dutiful son. Nest Learning 2nd Gen display in error mode with message E30 - "No Power Detected for Y1 wire". Y1 is the Air Condenser unit outside of home. In Tech Info menu, it also says that "WiFi Disconnected". Can't get out of error mode other than to view "Wiring Diagram" and the various "Tech Info" submenus. I remove display unit to check wiring, all are fully seated. Wires are Y1 (A/C Condenser), G (Ground), Rc (Cooling Power), W1 (Furnace/Air Handler), Rh (Heating Power). I go outside and manually inspect A/C and it's independent breaker, not on breaker good, flip breaker, still nothing. Go inside reinstall display unit, same message error mode, can't get out of error mode. Left. Today the A/C came on by itself and started blowing cold air. No more error mode. Settings display "No Wifi Connected" and several functions auto disabled. Removed display unit and then it showed "low battery". I think the turning the nest "Off" for a full day drained the battery enough that it just couldn't function and was drawing it's power from the Y1 A/C or W1 Heater, but since we were trying to run the A/C and not the heater it couldn't charge itself to switch the A/C on and since we have no C wire it can't charge itself when neither HVAC systems are running maybe?
Great detail. Our AC unit was being replaced. Amazing how fast the power drains on the nest. Low battery would not recharge on its own on the wall after power was off for half the day. I pulled it off the wall and charged it with USB for and hour and put it back and it connected to everything and worked fine afterword.
Then did you pull it off again? I have a similar situation recently. We got a new AC and my Nest went out of the battery every 2-3 weeks after I charged it by usb cable for a whole night. So annoy.
Most easiest video I've found to follow for the Nest thermostats. Much clearer than trying to get results from the Nest help line, I did the settings check and found these readings...6.5 and 40I , indicating as you said the battery(s) were low. I did find a USB charger that had the correct end on it and the batteries are charging as I type. let them run for an hour or two and see if that fixes the immediate problem. Thanks for the great video...a grateful friend.... Don
This video helped me diagnose and fix my NEST issue! So thankful. I am not handy, but with an Amazon power adapter and your vidos, I wired it myself and got it going!
Thanks for the info it really helped, I was able to charge the battery. It also sent me in the direction to solve another problem, someone had accidentally turned off the furnace switch. Big thanks, very much appreciated.
I have three Nest thermostats in my house and have had to purchase six to replace three that stopped working after a few months just to have three that work. After two years, I’ve reached the conclusion that the Nest thermostat sucks.
That plug adapter thing worked great and I just used a power supply from the DirecTV crap equipment laying around since I went to all Roku. You are awesome.
Learned tons from your video man! Thank you! Realized I only have a RH and W1 wires connected, no C. Keep losing power and the lin is at 20 which tells me I will likely need a (C) wire if it keeps happening since I have no G. Had no clue what any of this was! So thanks!
Thanks for reminding me about the mini USB for charging. My unit was off and I couldn’t reconnect to WiFi or lock the unit with low charge. Thanks again.
Our battery was low, however after charging we had an “e74” error...found out drain pan was clogged, shutting the red power wire off. This saved us water damage, however it took a while to figure that out. Nest being low on charge was only partly blame. Safety feature shut-off that was not well documented. Hopefully this helps some folks
@@geminigirl1135 some houses don't have a drain for the a coil condenser where the blower motor pushes air through to cool, it creates condensation which typically runs out of the unit down some PVC off the furnace into a drip line to a floor drain. Some people don't have floor drains and have to dump the accumulated water from running ac
Many thanks! Been going a little crazy for a couple of weeks, but your video helped me fix the little bugger, using the fan wire as a makeshift “c” wire. When you led me to the battery and lin levels, it proved to be the culprit. Finally running well, and the nest 3rd gen didn’t end up in the pond😉
Thank you for the video. Got an e74 message. I knew the drain pan was full. The evaporative unit line was clogged up, so the secondary drainage was filling up the drain pan. Thank god for the sensor. Water would have been all over the condo.
Absolutely worked for me. I have a nest connected to a SIME format hydronic system. It pushed out 6v to controller but uses steps down to 24v to it’s internal clock. Used your advice and drew another wire from board. Works perfectly.
So Helpful!!!!! Charging my nest now and hope that works but our power was out for a few days and your video makes perfect sense!!!! I may be able to return the battery I purchased for it! YAY!!!
If you hear a loud humming sound coming from your A/C it's your relay. A stuck relay will cause a contactor failure. This too can lead to low power on your nest. In case people were wondering when they hear their relay making a loud Humming noise. Fix this contactor issue and your Nest will not lose power again do to this. A short fix is to turn the AC on and off, so the relay is reset. However, it may one day not reset and require replacing the Relay. Easy fix too, just make sure the power is off when replacing! If after replacing the relay it continues, then there's a problem with your Home's electrical, and recommended to get an electrician at this point. Be safe when working with electricity, and Hope this helps.
Thank you so much for all your advice, you really help me in a lot of your videos you're very smart and helpful. I love your videos continue on my friend.
Thanks so much for your video, it does help us a lot for fixing the problem. Would like to ask even we fixed the problem having the power back on after charging the thermostat, do we need to replace the new battery as well?
Excellent video, as are your other ones! Thank you. For me when installing transformer, it only worked when I combined one of the wires from the transformer in/into the terminal with the existing Rh wire, and of course the other transformer wire into the C terminal. It did not work when I had one transformer wire in the Rc terminal and the other transformer wire in the C terminal.
Great video. We've had a few lengthy power outages in our area as of late and I never would have thought it would affect the thermostat and a need to charge it back up. I had the C-wire issue years back, which I also had to add as a power fix. Thank you for making great, helpful content!
Your advice to connect the Nest to a charger while it's off the base was excellent! It's charging right now. I'm troubleshooting why the Nest is dead. I did verify the 24 volts is NOT present at the base. But if I can verify the system works otherwise, then I'll resolve the issue with the 24 volts. How can I determine which generation my Nest is? I think it's Gen II. I want to change the battery simply because the thermostat is more than 5 years old. But, before I buy a new battery, I want to be sure I get the correct one.
Thank you for posting this info!!!! My power went out.. everything came back on but the AC the nest continued to say offline.. I remove the nest thermostat, plugged in to USB cord..the light blinked 3 times then it said to put it back on and I got the AC working. It's still under warranty will have them come check, but this helped significantly!!!!!! Thank you.. New follower!!!
I didn’t have to change the wiring because the common wire was there and just folded back but I appreciated the information you gave us to solve the problems!👍
Excellent video! Much appreciated! I have 3 systems in my home, all individually controlled by Nest thermostats. ONE of the thermostats controls an hvac unit to a room with its own hvac unit. The room is rarely used, so I’ve had the system in that room set to OFF. Is this ‘OFF SETTING’ possibly leading to the 2 ‘AAA’ batteries draining, because the thermostat isn’t getting power from the hvac unit?
Could you explain how to hard wire a 24v wallplug-power adapter into a Nest 1st generation? There are only 6 ports for cables, do I run one wire to C and another into the OB* slot? Thanks!
the "Lin" is actually "Iin" as in indigo. I is the symbol for amperage (current), mA means milliamps. So you can get the correct voltage, but if your current isn't high enough, it won't charge fast enough.
Thanks for this. Can that battery inside the thermostat be simply replaced (like Li in a watch or AA/AAA in the Honeywell) or does the entire Nest to be purchased again? What if I choose not replace the battery in the Nest, will it still function or all features within the Nest reliant on the battery?
I have two wire system on my cm907. I have been able to plug transformer and insert the two wires of thermostat to nest learning and that has resolved power issue but it is not kicking in my heating system. I have put white cable from cm907 into W and Red left it hanging.
It looks like the green wire at the Nest was not actually plugged into the furnace at all. I took the green wire and put on the C terminal along with a red wire at the furnace wiring block. Now my Nest is showing voltage at 3.8+ and my mA went from 20 to 200. Is that ok? And my AC seems to be staying on ok. Thanks.
Wish Google mention this on their installation instruction. Took me sooooo long to figure this out cause it will just steal power when there is not an extreme weather outside. Whenever it's too cold or hot the unit malfuntions.. All I had to do is pulling the blue wire that's buried in the wall already and plug in C.. I could not find anything about this online 2 years ago and their customer service just send me a new one which plug in and "solved" the issue(only because it's not that hot outside anymore, it's stealing power from the coil again).
Any ideas what would cause this issue in the first place? A loose wire somewhere? Faulty device? Adding a plug directly is fine but I’d like to know why it would even be necessary.
I'm getting a E73 code on my Nest 3rd Gen, I blew compressed air through the condensate out line so that seems to be clear. I also checked the voltage on the nest and it said 3.07v which I guess is low. The thermostat wire is brand new, replaced it from furnace to Nest when we installed the nest a couple of months ago.I removed the condensate pump and made sure its empty, later today I will try cleaning it with white vinegar so make sure that there's no slime buildup although I cleaned it a few months ago. Sometimes the furnace will kick on and run for 5 minutes and then kick off and the E73 code shows up again. The thermostat wire is a 5-wire one, Blue is hooked to the "C" terminal, the red wire is hooked to the "Rh" and the other wires, yellow to "Y1" and green to "G" and white to "W". I did the jumper (W1 connected to RC) and the furnace went right on. My furnace has an external bare transformer and is there a way to check if the transformer is flaky?
Good video. Two comments. First the "Lin" is I (eye) in, "I" is a notation of current which the 40mA is. Second, I am not sure putting two 24 AC transformers in parallel is a good idea. I guess if the AC is rectified before combining the two it may be OK but putting two out of phase AC signals could lead to pulsing or possible fuse opening. It may also be sensitive to the wiring polarity. One way may work and the other may cause cancelation of the two, not sure.
doesn't seem to work when wires from transformer is connected to RC and C. There seems to be a check in the thermostat that will not allow Cool and Fan settings to work with the RC connected to a transformer. Tests fail for Fan and Cool. Heat works though. I'll try doubling up on the RH connection with C to see if that works.
Nice video but it would have been nice if you told us what to do if the LIN number stays at 20 (replace battery????) and would have been good if you had told us where the other two numbers should be (Vin and Voc).
Is it possible to "split" the C wire, so as to provide power for battery charging and maintain fan-only use? I use fan-only quite a bit for moving the air around inside the house, with windows open, when I don't really need AC during summer months. I never use fan-only during winter, heating season.
Hi When I wanted to replace my old thermostat with a nest learning thermostat, there are two wires from the wall connected to my old hp thermostat on the W and B terminals. There is a jumper from R to RC. How should I connect these two wires to the new nest thermostat? W to W1 but B to ?
Well, I've had my Nest Thermostats for over 7 years and haven't had this issue until this morning. That being said, the batteries in any device isn't going to last forever. Now to see if the battery can be replaced.
The Nest thermostats we have (one Nest E and one Learning thermostat) both lost their WiFi connections. The trouble-shooting guides say that it will not reconnect to WiFi unless the battery voltage is at least 3.8, which I can confirm. Once connected, yes, the voltage can drift down a bit, below 3.8. But once it loses the WiFi, it will not connect unless the voltage is at least 3.8 v. I have found that charging the battery from the USB won't necessarily raise the voltage to 3.8. Most I could get was between 3.7 and 3.8.
Finally someone who can describe the purpose of the different wires. Seems like most HVAC guys guard this info with their life!
Most people are incompetent. They're just playing the averages
The fact that this is such a widespread issue should tell you all you need to know about these products
I'm never recommending Nest again. Garbage products
The Nest is disgraceful trash. Even when functioning, the UI and "learning" is brain-dead and incompetent. Even worse, it's an entire computing device that you're supposed to THROW AWAY WHEN THE BATTERY DIES. Unfuckingbelievable. I have a powered (C-wire) thermostat connection, and I had to trash the Nest because the battery died and the aftermarket batteries all have hideous reviews.
Thank you soooo much!!!
I am a single mother, homeowner who has to try to figure out things in my home before calling a handman.
And, with your video, I was able to fix my thermostate issue
I'm sorry what did you say I got lost in your magnificent beard
3am in the morning and I am listening and charging the battery right now. My hubby will be surprise when tomorrow our nest will e working great. ,,, I hope !! Thanks a million for your help
Did you end up having battery trouble again? I'm curious. I'm currently charging mine for the first time. Battery died after 2 years of use.
That's rare that I have an issue, search for a video, and the first video I find NAILS the solution. Thanks man for putting this together. Saved my Saturday evening.
I don't generally comment on these videos. However I had a low battery issue and I only needed to do your first step. I didn't even know you could take the face off the thermostat ! Thanks heaps.
Thank you for producing this video . Long story short, I’d been having battery issues. This alternative (to running new wire to add a common, or using the Google Nest Power Connector) seems to have done the trick.
Thank you, again, for sharing your knowledge.
I found a charger that would fit my Nest E and that did the trick! I would never have thought to charge the thermostat. Thank you for this very informative video.
We ended up exchanging this model for the slimmer version czcams.com/users/postUgkx0jZ_lGlDVJhDnmagEU8gn47cmfPNlLQU because it was too wide for the only door trim area that made sense to mount it on. However, we should have just noted the dimensions prior to purchasing. Otherwise, we love the doorbell. It works perfectly, and the video is very clear, even at night.
Your video nailed my Nest thermostat failure. I charged the thermostat through its android port with an old android phone charger for 2 hours: instant success. Thermostat came to life, connected with WiFi and everything works great. Thx
Great video and very informative. Here's my pro tip: First thing to do is check to see if one of your kids turned the switch on the furnace to the "off" position... 😅
Dude. You totally helped me tonight and my family is warm on a chilly night thanks to you! 🙏
Glad to help! Great you were able to stay warm!
Thank you for making this video. You saved me money and time. I did the switch out with the green wire and moved it to the c spot on the nest and furnace. No error code now.
I was having problems through the app while away. The temps have been from low 20’s to single digits (and even a few minus degree days) so I decided to stay with my bf and save my fuel. I check my Nest app regularly when I’m not home to make sure everything is ok @ home. Several times I’ve had one (of 2) thermostats show “offline” in the app. Researched the issue & determined that it was likely a low battery. Thanks for the well done video explanation on how to charge the existing battery. I almost bought a new one on Amazon! Good thing I read reviews & one person said better off recharging rather than replacing. I would have taken my unit apart trying to figure this out. THANK YOU 🙏🏻
Oh my goodness, thank you! I had a low battery and have searched to see what the problem was and thanks to your video, I was able to resolve it. I'm guessing like you said, it sat on a shelf for a while because it's a brand new thermostat. Thank you!!!!!!
Thanks from London UK. You got me out of a hole. I recharged it thru my computer. Missing the old days when I just had a clockwork timer that plugged into the wall. Cheers
Thank you so much for this video! I had no idea that my Nest needed charging! Living in Florida, I cringed at the thought of no A/C. I am now going to charge mine for the first time! Thank you again for sharing your knowledge!
One of the best videos I've watched on CZcams. Great job. A friend was having issues so I jumped on here to research the issue. I sent it to him right after the first step... that's how confident I was.
Thanks!
Wow, we're going through an insane snow storm in san antonio and our nest was dead! Had no idea if the usb charge! Thank you for doing this!!! You're a blessing!
We went through it too up near Dallas
Thank you so much! Power outage while I was out of town. Came back, and got low battery problem, I recharged it with phone cable, just like you said, and it worked.!!! You are the best!!
Does it permanently fix the issue? Or does the power go down over time?
Having the same issue… power outage triggered both Nest thermostats to start having battery issue. I can charge via phone cable and that will work for a few hours, then the battery dies again. These worked together fine for 5 years and all the sudden BOTH stop working at the exact same time. Idk what the issue is. Voltage and Lin seem fine.
You’re c terminal description was instrumentalist the success of my Nest thermostat’s successful activation. Thanks!
Thanks! My thermostat just went out in 100° Texas heat and this video saved my day 🎉
Fixed, thank you! Just needed as quick zap from a USB connection. Levels are all good. We're up and running!
Helped me figure out why my nest was acting up after a long power outage. Thanks!
This video single handedly helped me fix my mother's Nest Learning 2nd gen thermostat when nothing in Google's Nest Troubleshooting site, Nest ProTech Diag pdf, Nest Community forums, or any other Google Search return could.
The Event: Heating for past few winter months (NO A/C usage since October 2022). Beautiful day in East Texas, mom turns Nest "Off". Next day, 80°F+ and 95% humidity, mom turns on A/C, and leaves to run a few errands. On arrival home she realizes that it's 78°F in the house. Air Handler blowing air, air not cooled. She calls me, the dutiful son. Nest Learning 2nd Gen display in error mode with message E30 - "No Power Detected for Y1 wire". Y1 is the Air Condenser unit outside of home. In Tech Info menu, it also says that "WiFi Disconnected". Can't get out of error mode other than to view "Wiring Diagram" and the various "Tech Info" submenus. I remove display unit to check wiring, all are fully seated. Wires are Y1 (A/C Condenser), G (Ground), Rc (Cooling Power), W1 (Furnace/Air Handler), Rh (Heating Power). I go outside and manually inspect A/C and it's independent breaker, not on breaker good, flip breaker, still nothing. Go inside reinstall display unit, same message error mode, can't get out of error mode. Left. Today the A/C came on by itself and started blowing cold air. No more error mode. Settings display "No Wifi Connected" and several functions auto disabled. Removed display unit and then it showed "low battery".
I think the turning the nest "Off" for a full day drained the battery enough that it just couldn't function and was drawing it's power from the Y1 A/C or W1 Heater, but since we were trying to run the A/C and not the heater it couldn't charge itself to switch the A/C on and since we have no C wire it can't charge itself when neither HVAC systems are running maybe?
Great detail. Our AC unit was being replaced. Amazing how fast the power drains on the nest. Low battery would not recharge on its own on the wall after power was off for half the day. I pulled it off the wall and charged it with USB for and hour and put it back and it connected to everything and worked fine afterword.
Then did you pull it off again? I have a similar situation recently. We got a new AC and my Nest went out of the battery every 2-3 weeks after I charged it by usb cable for a whole night. So annoy.
Most easiest video I've found to follow for the Nest thermostats. Much clearer than trying to get results from the Nest help line, I did the settings check and found these readings...6.5 and 40I , indicating as you said the battery(s) were low. I did find a USB charger that had the correct end on it and the batteries are charging as I type. let them run for an hour or two and see if that fixes the immediate problem.
Thanks for the great video...a grateful friend.... Don
This video helped me diagnose and fix my NEST issue! So thankful. I am not handy, but with an Amazon power adapter and your vidos, I wired it myself and got it going!
Thanks for the info it really helped, I was able to charge the battery. It also sent me in the direction to solve another problem, someone had accidentally turned off the furnace switch. Big thanks, very much appreciated.
I have three Nest thermostats in my house and have had to purchase six to replace three that stopped working after a few months just to have three that work. After two years, I’ve reached the conclusion that the Nest thermostat sucks.
That plug adapter thing worked great and I just used a power supply from the DirecTV crap equipment laying around since I went to all Roku. You are awesome.
Really helpful video... I couldn't get COOL to work until he explained O/B wire in detail... THANKS!
Best video I have seen on this issue to date! I am going to head home from work and diagnose my low battery issues. Thanks for the help!!
Thank you very much for your help. I plugged the Nest 3 thermostat to phone charger and it started working and connected to Internet. Thanks again 👍😃
Learned tons from your video man! Thank you! Realized I only have a RH and W1 wires connected, no C. Keep losing power and the lin is at 20 which tells me I will likely need a (C) wire if it keeps happening since I have no G. Had no clue what any of this was! So thanks!
saved the day, it's November in New England and our Nest was completely drained
Thanks for reminding me about the mini USB for charging. My unit was off and I couldn’t reconnect to WiFi or lock the unit with low charge. Thanks again.
Awesome fix and thank you for helping me avoid buying another device!
Our battery was low, however after charging we had an “e74” error...found out drain pan was clogged, shutting the red power wire off. This saved us water damage, however it took a while to figure that out. Nest being low on charge was only partly blame. Safety feature shut-off that was not well documented. Hopefully this helps some folks
this comment was the most helpful. thank you!
Same
What is a drain pan ?
@@geminigirl1135 some houses don't have a drain for the a coil condenser where the blower motor pushes air through to cool, it creates condensation which typically runs out of the unit down some PVC off the furnace into a drip line to a floor drain. Some people don't have floor drains and have to dump the accumulated water from running ac
Thanks! The drain line was clogged which caused the water to trigger the safety switch cutting power, cleared it and fixed it! Thanks Jon Y!
Many thanks! Been going a little crazy for a couple of weeks, but your video helped me fix the little bugger, using the fan wire as a makeshift “c” wire. When you led me to the battery and lin levels, it proved to be the culprit. Finally running well, and the nest 3rd gen didn’t end up in the pond😉
i had the fan wired as a makeshift c wire too - but i'm still having low power issues. what was the culprit, and how;d you fix it?
Thank you for the video. Got an e74 message. I knew the drain pan was full. The evaporative unit line was clogged up, so the secondary drainage was filling up the drain pan. Thank god for the sensor. Water would have been all over the condo.
Absolutely worked for me. I have a nest connected to a SIME format hydronic system. It pushed out 6v to controller but uses steps down to 24v to it’s internal clock. Used your advice and drew another wire from board. Works perfectly.
Thanks for sharing
Great explanation and options. You sir made my life easier today. Many thanks.
Welcome, thanks for watching.
So Helpful!!!!! Charging my nest now and hope that works but our power was out for a few days and your video makes perfect sense!!!! I may be able to return the battery I purchased for it! YAY!!!
Glad it helped, and that you got your problem fixed! Thanks for watching and subscribing.
Google is negligent in not providing easily fixed battery and charging guidance like this
Amazing and precise video! Thank you so much. God bless!
Thanks for watching!
Thumbs up dude, charging my nest now and going to look at the furnace...
Could I use a jumper from the R wire to the C wire input?
Thanks!
If you hear a loud humming sound coming from your A/C it's your relay. A stuck relay will cause a contactor failure. This too can lead to low power on your nest. In case people were wondering when they hear their relay making a loud Humming noise. Fix this contactor issue and your Nest will not lose power again do to this. A short fix is to turn the AC on and off, so the relay is reset. However, it may one day not reset and require replacing the Relay. Easy fix too, just make sure the power is off when replacing! If after replacing the relay it continues, then there's a problem with your Home's electrical, and recommended to get an electrician at this point. Be safe when working with electricity, and Hope this helps.
I learned so much! This is Great. Do you show us how to replace the battery?
Thank you, your video just saved me! I also have Ring here and the charger is compatible in case anyone else needs to know that.
This may have been mentioned, but that's not an "L", it's a capital I, the variable for current as in Q=I*R
Thank you Brother fixed my issue
Thank you so much for all your advice, you really help me in a lot of your videos you're very smart and helpful. I love your videos continue on my friend.
Thanks so much for your video, it does help us a lot for fixing the problem. Would like to ask even we fixed the problem having the power back on after charging the thermostat, do we need to replace the new battery as well?
Excellent video, as are your other ones! Thank you. For me when installing transformer, it only worked when I combined one of the wires from the transformer in/into the terminal with the existing Rh wire, and of course the other transformer wire into the C terminal. It did not work when I had one transformer wire in the Rc terminal and the other transformer wire in the C terminal.
Great video. We've had a few lengthy power outages in our area as of late and I never would have thought it would affect the thermostat and a need to charge it back up. I had the C-wire issue years back, which I also had to add as a power fix. Thank you for making great, helpful content!
Your advice to connect the Nest to a charger while it's off the base was excellent! It's charging right now. I'm troubleshooting why the Nest is dead. I did verify the 24 volts is NOT present at the base. But if I can verify the system works otherwise, then I'll resolve the issue with the 24 volts.
How can I determine which generation my Nest is? I think it's Gen II. I want to change the battery simply because the thermostat is more than 5 years old. But, before I buy a new battery, I want to be sure I get the correct one.
Thank you for posting this info!!!! My power went out.. everything came back on but the AC the nest continued to say offline.. I remove the nest thermostat, plugged in to USB cord..the light blinked 3 times then it said to put it back on and I got the AC working. It's still under warranty will have them come check, but this helped significantly!!!!!! Thank you.. New follower!!!
I didn’t have to change the wiring because the common wire was there and just folded back but I appreciated the information you gave us to solve the problems!👍
Thank you very much for sharing this knowledge. The advise to connect to USB and reconnect worked.
Thank you , sir🙏
Most welcome! Thanks for watching me and helping me on my journey to 100K subscribers!
Excellent video! Much appreciated! I have 3 systems in my home, all individually controlled by Nest thermostats. ONE of the thermostats controls an hvac unit to a room with its own hvac unit. The room is rarely used, so I’ve had the system in that room set to OFF. Is this ‘OFF SETTING’ possibly leading to the 2 ‘AAA’ batteries draining, because the thermostat isn’t getting power from the hvac unit?
Thank you!!!!!!! Fixed my issue, you rule!!!
My nest only runs out of battery on really hot days. Would you know exactly what the issue is? Going to try a few of these fixes next time it happens.
Thank you for your help!!! Great thorough video.
Thanks for the usefull video! Got 3.9 Volt power and over 200 MilliAmpere current, so should be fine.
I would recommend, absolute first step, just do a simple reset. That worked for me for low battery notification. Then do what this guy says… 👍
Could you explain how to hard wire a 24v wallplug-power adapter into a Nest 1st generation? There are only 6 ports for cables, do I run one wire to C and another into the OB* slot? Thanks!
Thank you brother!
the "Lin" is actually "Iin" as in indigo. I is the symbol for amperage (current), mA means milliamps. So you can get the correct voltage, but if your current isn't high enough, it won't charge fast enough.
Thanks for this. Can that battery inside the thermostat be simply replaced (like Li in a watch or AA/AAA in the Honeywell) or does the entire Nest to be purchased again? What if I choose not replace the battery in the Nest, will it still function or all features within the Nest reliant on the battery?
I have two wire system on my cm907. I have been able to plug transformer and insert the two wires of thermostat to nest learning and that has resolved power issue but it is not kicking in my heating system. I have put white cable from cm907 into W and Red left it hanging.
FYI that is not an Lin terminal. That is not an "L" it is an "I" which is the symbol for current (just like V is the symbol for voltage).
I was really hoping someone else caught that lol
In addition, mA has to be read as mili ampere.
It looks like the green wire at the Nest was not actually plugged into the furnace at all. I took the green wire and put on the C terminal along with a red wire at the furnace wiring block. Now my Nest is showing voltage at 3.8+ and my mA went from 20 to 200. Is that ok? And my AC seems to be staying on ok. Thanks.
Thanks for sharing. Idk why my thermostat shows low power after two years of using with no issue. Is is HVAC problem as well?
Wish Google mention this on their installation instruction. Took me sooooo long to figure this out cause it will just steal power when there is not an extreme weather outside. Whenever it's too cold or hot the unit malfuntions.. All I had to do is pulling the blue wire that's buried in the wall already and plug in C.. I could not find anything about this online 2 years ago and their customer service just send me a new one which plug in and "solved" the issue(only because it's not that hot outside anymore, it's stealing power from the coil again).
Why doesn’t my ac stay on? It turns off for like 10 mins then goes back on. Sometimes A.C. doesn’t even work if when it’s on. What’s the problem
Thank you so much. Knowledge is power. I work as Respiratory Care Practitioner. Let me know if I can return the favor.
Any ideas what would cause this issue in the first place? A loose wire somewhere? Faulty device? Adding a plug directly is fine but I’d like to know why it would even be necessary.
Thanks. Very thorough and informative video.
Wow man I feel like I need to pay you for this video ! 😂
THANK YOU! THANK YOU! THANK YOU!
Thanks for watching and subscribing!
I'm getting a E73 code on my Nest 3rd Gen, I blew compressed air through the condensate out line so that seems to be clear. I also checked the voltage on the nest and it said 3.07v which I guess is low. The thermostat wire is brand new, replaced it from furnace to Nest when we installed the nest a couple of months ago.I removed the condensate pump and made sure its empty, later today I will try cleaning it with white vinegar so make sure that there's no slime buildup although I cleaned it a few months ago. Sometimes the furnace will kick on and run for 5 minutes and then kick off and the E73 code shows up again. The thermostat wire is a 5-wire one, Blue is hooked to the "C" terminal, the red wire is hooked to the "Rh" and the other wires, yellow to "Y1" and green to "G" and white to "W". I did the jumper (W1 connected to RC) and the furnace went right on. My furnace has an external bare transformer and is there a way to check if the transformer is flaky?
Good video. Two comments. First the "Lin" is I (eye) in, "I" is a notation of current which the 40mA is. Second, I am not sure putting two 24 AC transformers in parallel is a good idea. I guess if the AC is rectified before combining the two it may be OK but putting two out of phase AC signals could lead to pulsing or possible fuse opening. It may also be sensitive to the wiring polarity. One way may work and the other may cause cancelation of the two, not sure.
doesn't seem to work when wires from transformer is connected to RC and C. There seems to be a check in the thermostat that will not allow Cool and Fan settings to work with the RC connected to a transformer. Tests fail for Fan and Cool. Heat works though. I'll try doubling up on the RH connection with C to see if that works.
Nice video but it would have been nice if you told us what to do if the LIN number stays at 20 (replace battery????) and would have been good if you had told us where the other two numbers should be (Vin and Voc).
It was my furnace. The furnace tripped due to a dirty filter, hence not providing power to the thermostat.
Thanks!!
Do you need a common wire for Nest Gen 3 Thermostat? Or can the R wire provide enough power to keep the Nest charged/ working?
Is it possible to "split" the C wire, so as to provide power for battery charging and maintain fan-only use? I use fan-only quite a bit for moving the air around inside the house, with windows open, when I don't really need AC during summer months. I never use fan-only during winter, heating season.
Good question
Just worked for me thanks for the help!
Hi When I wanted to replace my old thermostat with a nest learning thermostat, there are two wires from the wall connected to my old hp thermostat on the W and B terminals. There is a jumper from R to RC. How should I connect these two wires to the new nest thermostat? W to W1 but B to ?
Well, I've had my Nest Thermostats for over 7 years and haven't had this issue until this morning. That being said, the batteries in any device isn't going to last forever. Now to see if the battery can be replaced.
Best video ever- you made my night
Glad it helped!
Very professional good job thank you so much
helpful and clear. good video!
The Nest thermostats we have (one Nest E and one Learning thermostat) both lost their WiFi connections. The trouble-shooting guides say that it will not reconnect to WiFi unless the battery voltage is at least 3.8, which I can confirm. Once connected, yes, the voltage can drift down a bit, below 3.8. But once it loses the WiFi, it will not connect unless the voltage is at least 3.8 v. I have found that charging the battery from the USB won't necessarily raise the voltage to 3.8. Most I could get was between 3.7 and 3.8.
Am having power issues and when the nest turns back on and says as is running. The air handler isn't working. Any tips?
It's really tough to get that plug into the RC when a thermostat wire is already in there! Those nest wire terminals are TINY. Suggestions?
Use a small wire nut put the two wires together and use a third wire two the nest hope that helps
Thanks again and