How to Tell if Your Home Thermostat is Bad - Bypass it and Find Out
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- čas přidán 7. 07. 2018
- How to bypass an HVAC thermostat. Do you want to know if your home thermostat is bad, defective, or malfunctioning and that is the reason your AC or furnace is not working? In this video I will show you how you can tell if your thermostat is bad. Along with simple troubleshooting tips. You will simply need to bypass the thermostat to see if the problem really lies in your thermostat or not. Also, here is a list of what the thermostat terminals mean:
G= Fan
Y= Cooling
W= Heating
R= Power
Rc= Power to Cooling
Rh= Power to Heating
C= Common
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thnak you so much for all your clear videos,you are actually helping lots of poor people,god bless you always my friend,cheersssss.......
Watched Several of his videos ... They are exceptionally informative in layman terms. His simple details on the videos leave little to question... My hats off to him! and thanks for saving me a wait and a service call.
I don't know ANYTHING about hvac..but recently had a recharge since i have a slight leak. I'm sure many have told you already but I just have to say, THANK YOU so much for all your videos. I've watched them to learn and understand what's going on so I can educate myself. You are doing the community such a service. You are concise, clear and don't spend your time wasted on technical jargon. IMO, that demonstrates how well you know and and understand what you do. Please don't ever stop sharing whatever you do, you are so absolutely appreciated by the community!
lol that’s what I’m saying It’s green ground?
Wow! I can't believe what I've learned in less than one hour here. Thanks. I am an electrical and computer engineer, but until today, my central air system was just a big "black box" to me! Glad to have that cleared up.
So glad I found this video. I thought my contactor or short cycle relay was bad. After watching this and jumping the terminals I determined I had a bad t-stat. New batteries didn't fix it. New one installed today and everything works!
Thanks for posting this.
Brother you just saved me a $200 service call, and gave me an excuse to get one of those nice app based thermostats. Plus it's my birthday today. It started off bad, but seeing that I saved at least $200, and learned a bit about my furnace, that's the best gift I've gotten all day.
Happy Birthday bro!!! :) Glad to hear the video helped you figure out the furnace problem and get it fixed! Enjoy the new thermostat and stay warm!
PERFECT! EXACTLY what I was looking for! Our thermostat broke (new one won't be here for a few days) but our AC was fine! Just needed to turn it on!!!
I am very appreciative....you deserve to be recognized for the help you offer....believe me without your video I would literally bake in my apartment....I live in Arizona and someone I live with took the cover from the thermostat so I would have to suffer the heat.....Yes crazy right? But that person only wants to see me suffer...and be hurt....or have to struggle....anyway enough about that! Your awesome and I just want you to know that I am so grateful and could never thank you enough! You are needed for your knowledge in this matter. Thank you! Thank you! Thank you!
Great job! You are a very good teacher. Explained the essential elements of the problem/solution in a easy to understand and concise manner.
Thank you!
Thanks! Happy to hear you liked the video :)
Thank you again !!! You explained everything very simply on how to trouble shoot the thermostat , to eliminate the thermostat from the AC or the heating. I did this at my niece's house and found the problem was the thermostat . Thanks again !!!
There certainly are things that are much easier to understand, than they are to explain! You did a very fine job. (I even got it the first time, before the well summarized recap. Thank you for taking the tine to share!
One very important thing he forgot to mention is NOT TO JUMP "R" to "C" or be VERY careful not to touch the "R" to "C" as this will burn the fuse on the control board or trip the low voltage fuse inside the furnace. In most cases you will not even know you did this as it will not spark or anything. The fuse is like a car fuse that sits in a slot on the control board or sometimes a button on the housing where the control board sits.
Excellent comment.
What color is "C"?
R is usually the hot wire with 24 volts and C is the neutral wire, so if they touch it is like putting a wire from one hole in an outlet to another in the same outlet !! but because the voltage is 24 and not 110 or 220, it usually will not spark and not electrocute someone.
Yeah I just accidentally jumped R to C (red to blue in my case).
Thanks for revealing the fuse in my furnace. Found it. Going to the auto shop tomorrow for a replacement 3A blade fuse.
I just jumped R and my entire board sparked and went blank…uggghhh
Thanks for all the videos Jay, I was in school for hvac before covid came, all your videos on all this are really helping fill in some blanks, only on video 10 of 60 for your ac videos! plan on watching them through! thanks again! big fan!
Great instruction! Clear and concise!
I liked the way you explained the video. Much easier to understand. I always be watching your HVAC video. It be helping me out. Thanks
Great video. Thanks much! As a suggestion, I would first start with red and green wire (fan) with the jumper since there is no timer or limit switch on that circuit. By using the red and yellow (A/C) you might turn on the timer/limit switch because the A/C compressor has a high and low side for pressure and possibly damage the A/C unit. If you activate the A/C timer/limit switch, the A/C unit may not operate until the time/limit switch times out.
I would like to say thank you. Your video was easy to understand and very informative. After following the steps you described i was able to determine that i had a faulty thermostat. Once again thank you.
Thank you my friend have no words to express how much I appreciate all of your help, you have saved me a lot of money.
Wishing you the best.
Just wanted to say thank you. Ac went out on my 8 year old house. Replaced capacitor and contactor because they are the least expensive parts but unit wouldn’t kick on. Turns out had a bad ecobee thermostat I bought after building new home.
You did a fantastic job, explained everything well on what was going on with everything. Used your testing method, fixed my issue. Thank you!
Rc 24v power from cooling tranformer R24v power fro heating transformer ycomperssor contacter y2 compressor conttacter stage 2 g fan e merfncy aux het rely lseds out put when set to em heat c 24v comon ..
Jay, after replacing the control board didn't solve the no heat problem and numerous other checks using your vids, I verifieded with a paper clip at the furnace and then the thermostat that it is the thermostat that I replaced a few months ago either was bad then or more likely I didn't throw the breaker and ruined it. I have just ordered another Tstat. Thanks for all your help. You saved me again and never have had to spend the money on a teh visit
Thanks for the good explanations and making clear the purpose of the various terminals and the wire color code..
Man, you saved me! My thermostat was bad. Weird because I bought a honeywell cheapo several months ago. What happened is I turned on ac for the first time and heat seemed to come on and so did the compressor at the condenser. I turn off the thermostat and seemed like 7 to 8 minuets before it finally turned off. Anyway, I jumped red and yellow and boom , my ac is throwing cold air. I will be at home depot in the morning. Thanks man for this video and all your videos. I learned alot tonight.
This channel has saved me so much money. Tip this guy!
Thank you for sharing!
I TRULY APPRECIATE your vid of CONCISE INSTRUCTIONS 👌🔧 😊
Happy to help! :)
You really helped me out. Thank you for these great videos!
Well done and thank you for that awesome tip. My unit is not working and your advice, gives me more time to consider options. Great safety comments too, really appreciate you!!
I do have a question, my issue with my AC is I accidentally disconnected the wires from the outdoor unit to the sensor. And the wiring the installer did was to connect to the same outdoor safety switch that brings the line to the load. I can't find any advice on how to reconnect the sensor wires.
Greatly appreciated this video. You're saving a loved one a lot of money. 🤜🏼💥🤛🏼
Great clip my friend
Very helpful . Thanks
Thanks for your explanation. I found this jumper wire by my air handler after an HVAC inspection. I thought something might had come loose, now I know they were probably using it to test it.
What a terrific way of explanation 👌
Keep up the good work .
These hvac videos are amazing my dude!
Exactly what I needed to know, beyond clear instructions lol. Thank you!
Thank you so much....I was with out a.c. I did this and it worked...Im changing the t-tat tomorrow
Thanks for saving me from freezing, you are simply great. Everything you said worked as in your video, my heater is now running and the house is getting warm. If I understood right putting jumper wire between R and Rc will make both cool and heat work. Before I had the wire in Rc only and AC worked fine but heat didn't.
Happy to help! Yes, that is correct. Some thermostats have Rh as well. (power to heating). Glad to hear you got the heat going again! Stay warm! :)
RC and RH are separated to accommodate systems that have two transformers. If you only have one transformer, you terminate to either one and have them jumped together. Most stats will have a factory jumper already installed as most systems have only one transformer.
Great Video! Thanks a lot. I tried jump start and air conditioner is started. Replaced Honeywell thermostat. Saved lot of time and money!!
Awesome! Glad to hear the thermostat bypass helped you pinpoint the problem! Thank you for coming back and commenting, stay cool! :)
I wanna thank you! This video is so well explained and helped me save so much money. Keep up the great work!
Thanks for all your videos especially this one which showed I had a bad thermostat.
You're welcome! Glad to hear you were able to find what the problem is with my videos :) Stay cool!
What's up Jay? Thanks so much for your videos. They helped so much in my troubleshooting skills.
You're welcome! Thank you for watching :) Glad to hear they are helping with troubleshooting!
Great Videos! Very thorough and clear. I decided that some of those magnetic jumpers would have come in handy a few times so I ordered some. I was glad i thought to see if you had a link for them, which you did, so I cleared my cart and used your link instead. You deserve the support even if it is only a little.
Sir Jay! thank you so much for spreading the knowledge. Your jumping advice resolved my problem.
Thank you for the HVAC thermostat test info.
No problem, thank you for watching!
very good! stay short in explanation and right to the point! as shorter the videos, the better it helps!
Super helpful, thanks so much
I wish I could’ve seen this video before .. I remember I didn’t know what to do and i call an ac service.. but im glad i did subscribe to see all videos and learn more from a professional..
Hi again Madara! :) Thanks for subscribing and watching my videos! Hopefully from now on you will be able to fix all the problems yourself! With all the self-learning you are doing, I am sure you will figure out any future problems.
Clear and concise.
2:26 is the single most considerate thing i have ever seen in my life. faith in humanity restored.
Thank you Dude!! Just replace my thermostat and the technician did not do a by pass from R to RC and my AC turned on.
The oil provider ROB here in NY is charging mr for 125 dollars diagnostics and 215 per hour of labor and plus for parts and blah blah blah!!
I just did it my self bypassing..
Such a helpful video, thanks!
U deserve more than words of million thanks... If I wanted to install a new ther... how difficult is it ? I never had to replace one b4 I got 4 wires, Red Green White n Yellow
just what i needed. thanks so much!
Very good explanation. Getting me those jumpers.
Thank you for making these videos.
You Sir are a blessing Thanks so much for sharing. A friend had her condenser fan making noise so we ordered a new one but shot some lube into the shaft and now it is quiet 2 days now. that was a diff vid of yours
Thank you so much. Just got my furnace back on after my thermostat died using a 📎 because of this video 🥳
You sir are a wealth of knowledge! I'm subbed! I am having these issues at present and came across your channel and have been watching the videos you posted. My furnace just started short cycling recently and I am trying to troubleshoot it with out calling for repair but that option isn't off the table. I have a lennox elite g50uh. I don't have the on/off switch at the furnace so I have to trip the breaker. I cleaned the flame sensor though it really didn't look that dirty as compared to what the videos have shown it can look like but problem remains. I will replace it since it doesn't cost much and see if that fixes it. Blower fan starts, the igniter lights,, I get flame but it turns itself off. It either turns itself off quickly or turns on but stops shortly thereafter.
I've wanted to replace the thermostat to something a bit more modern (and I'm not sure if this is the problem).
VERY WELL DONE, THANKS
Fantastic. Very informative.
Thank you so much for your explanation! You saved me a service call at the very least and possibly being upsold into a new system. My confidence level has risen!
Thank you for this video. It actually worked!
Thanks! Now I know my thermostat is busted, so I ordered an new one. Saves paying the HVAC guy. Very clear.
Great video, great help. Thanks
Great work on this channel. Subbed !!
Thanks! :)
Expert always nice I love all your videos Jay. Thank you so much.
You do a very good video!!!!!!!
You are THE man! Thanks.
Great Advice Thank you so much God Bless you and ✌🏽
Thank you for this great video (and series) Jay. My A/C wasn't starting up, so after some investigation I determined that the major components in the AC unit appeared to be fine but the contactor switch wasn't engaging. I viewed your video on the top ten reasons for that not working and landed here. I jumpered my thermostat and sure enough the contactor engaged and the unit started cooling so I knew with confidence that the thermostat was faulty. As a bonus I found an unused fifth wire running to my thermostat that I was able to connect to common on the furnace control board so that I could get a WiFi enabled replacement that didn't require batteries (it might even be the same Honeywell unit you have pictured in the video). I should also mentioned that the unit I replaced seemed otherwise fine - the display looked okay and the furnace fan was still blowing (I did replace the batteries as a cheap test anyway but it didn't help). So it would appear that a single system is capable of failure on a thermostat without the others necessarily being bad too. Thanks again - I loved being able to figure this out by myself without making a service call (or buying replacement parts at random to see if that might be the solution).
Glad to hear you were able to track down the problem and get it fixed! People like you are the best :) Many people would only watch one video for a couple minutes and then comment right away asking, "My AC doesn't turn on, what do I do?" You actually took the time to watch the needed videos and figure it out. Congrats on repairing it yourself! Next time around it will be easier ;) Thank you for commenting and sharing your experience!
I have a Honeywell stat and have a jumper between r an e.g. or r and rc is that. Correct karl
@@WordofAdviceTV l
Thank you so much for your videos and advice!
Thanks job man appreciate it
Most Excellat, just simple 😁😁😁
Exactly what I was looking for; thanks, esp. for the excellent camera work. As a bonus, I get to buy a new toy: magnetic jumper; never knew that was a thing.
Excellent explanation, thanks
This worked for me. Thanks for posting
Should I remove the small jumper wire I made after it turns on or leave it there?
Thanks Man, trying to be an
HVAC Technician!
Very cool 😎 Thanks for all your help
Thank you, sir. Much appreciated.
very educative. Thank you regards
This solved a problem for me yesterday..thanks bro
Perfect! Problems solved are good outcomes!
Thank you for the great video. I have a question with regard to the bypass. You mentioned that it is better to turn the furnace switch off After you find out if the thermostat is getting power to do the bypass. How can the motherboard gets power to turn on things if you switch the furnace off, am I missing something?
Very good info!
That was a good advice but I have a question for you my furnace keeps short cycling and never gets up to intended heat what should I look for and can I jumper this to bring house heat up
Cool video bro gracias
You are the best on how you explain the process of troubleshooting. I have question for you.
One Smart termostat Nest was set to Heating. But the system turned on the AC during winter and caused the evaporator to freeze.
For troubleahooting:-
1. Y1 is removed from the circuit board at furnace, and removed the Nest thermostat face. Y1 still connected on terminal plate of thermostate. And It read 24v on Y1 at furnace side while termostate is not even covered. If Y1 is removed from termostate terminal, it has no voltage down the Furnace side Y1.
I believed the Y1 is getting power at terminal plate of thermostat. Which means RC was creating direct connection to Y1.
What do you think?
You’re the best. Thank you
You're welcome! :) Thank you for commenting!
Thank you 👍👍👍👍👍
Hi, thanks so much for sharing this video. We have replaced the condenser fan motor and capacitor, but the fan still runs very slowly and the air in the house is still not cooling. Could you help us figure out what might be the issue here? Really appreciate it!
My Symptom: Air Conditioning working fine with no Issues. But when I would turn on the heat I would get a wiring error on the Nest E103 W1. Note: the Compressor would short cycle in heat mode but not in cooling mode. After about 10 minutes of this I would get the crossed wrenches symbol on the Nest. This system has been working for 4 plus year prior to the error message.
Love your AC videos! FYI I have a 5 Ton Trane handler and a Trane Model 4TWX8060A 1000CA Compressor. When I jumped the R1 and W1 to by-pass the Thermostat it blew the 5 amp fuse in the air handler. Not sure what I did wrong? However, once I got the fuse replaced I abandoned the thermostat by-pass test and re-did the R1, Blue Common, and W1 connections at the compressor and now all seems to be working.
Thank you for all the helpful videos!!!
Love your channel I just replaced my units battery and contactor it was working for a day but this morning I went to check on it because for some reason it was not turning on and there was a little wire that was broken so I reconnecting it but my air has yet to turn back on?
Thanks for info
FYI, It just started getting warm and my A/C stopped cooling/working , the Cool temp was set to 83 and the current temp in house was 85. The fan in the house was working but I went outside to see if the compressor/fan were going but it was NOT. So, it was NOT being turned on by the thermostat ( or the fan/compressor/capacitors were bad ). So, I changed the batteries ( 2 AAs ) and then tried to turn on the Thermostat but it stayed in the OFF position no matter what the COOL or HEAT setting was. So I went to chatGPT AI and it said to press the RESET button on the thermostat ( using a small screwdriver to push into the reset hole ). Voila , the Thermostat re-booted and I was able to set the Cool temperature and startup the A/C. So, with a good DIY attitude and Jay you can fix things too !
Thank you for that info!
Very useful 👍
Another excellent video but sadly nothing happened on jump. Have been going step by step at least I can rule out the thermostat. No fuse in sight, connector works when pushing in, have a Payne and no obvious or accessible float valve when I tried to check. The mystery continues thanks for sharing your expertise
Great Video!! Before I tackle the Thermostat and Control Board. When I switch to fan only the blower does not come on. When I switch to Heat "Auto or On" the fan does not come on but the furnace is fired up and working. Fan may be on but really can't feel it. When I switch to AC and auto the blower works great. Does the blower have a different speed when in Heat mode? Seems it should be blowing more air into the house like when in AC mode. Thanks for a reply!!
Before replacing the thermostat or something else check for obstructed drain water duct kicking the sensor off. Just remove the plug with 2 wires some where around the pvc tube. It may help
that was a great explanation
Great video. So for the nest I have it says I need a common wire. I bout the 24 v adapter. Plug the white n black into C and the white into R with the red wire too tight?
Great instructions video for thermostat test. Easy to understand.
can you speak slowly For next video please????
Thanks to your video I have heat on a chilly night.
Happy to hear that! :) Thank you for leaving a comment, stay warm!