You got off to a slow start, but when you got rolling it was terrific. It was a clear explanation of the circuits involved and helps a lot in troubleshooting a thermostat problem. Nice work and thank you.
I owe you a beer or several. If you are ever in Minneapolis let me know. Your explanation was what i needed to fix the wiring mess in my furnace. THANK YOU. Now my AC works and my pregnant wife will be less uncomfortable.
Love your videos! As an electrical engineer grad but more into business now, I don't use to much electrical engineer. You have great videos to brush up on engineering aspects. Keep it up love your video education on electrical engineer!
this is an excellent video. I usually end up installing a lot of lutron or crestron thermostats, and this really explains what's happening plus troubleshooting.
Sadly I was falling asleep but good explanation in in an AC repair class RN and IM still learning even my teacher said this video needs more enthusiasm
@@GuyBrown I am about to open the cover on a unit; I worked up to setting the condenser myself without supervision but did not become proficient - zero time actually - at any of the inside of the unit; I installed 4-wire mechanical T-Stat per *Terry's* directions; He has many decades doing this and now works at LP - which is a fast-paced major shop in the county so he knows his stuff; We robbed the T-Stat from a building to get tenant's area heated; I hooked up 3 of the wires by unmistakable color-code and there was only one wire left so I attached it then failed to pull cardboard cover for shipping which I did on a call-back then tried the fan and the blower came on but I get hot customer ( he is a contractor ~ worked at BMW shop and has his own mechanical tools ) telling me the unit is not heating; I have emailed the supplier with PN's to get a wiring diagram but looks to be a very common style of the era prior to "heat pumps" I have ¼-million hours with only one scar so I can open the unit in relative safety - it is dangling wires that I did not install so I have to be x-tra careful not to break anything that is working and can really use your oversight;
Starting school for this soon. So safe to say that if the furnace doesn't run. Check W to C and if you have 24 vilts. Then that means the stats good. No 24 Volts from W to C and stats bad? as long as there's 24 v from R to C.
Thank you for the video. A while ago I changed my wires and when the summer hit my condenser unit did not go on. Thanks to this video I was able to pinpoint the 2 wires that needed to be connected and now it is working.
The green wire is for the air handler unit fan motor relay only, the yellow wire is for the outside condenser unit. The yellow wire energizes the compressor contactor, the fan motor is conected in the same contact. If the compressor works,but the fan motor fails, the capacitor may be damaged,defective,or the fan motor may have an open winding, most common problem with an old fan motor is the capacitor.
Hello I Have been doing home wiring for years (110-220) in them but never certified and i am learning all there is about the symbols and all. I am going for an electricians apprenticeship with our local union hall . I would love to watch and learn all you have to teach. I thank you for these videos and more if they are out there .
Thanks so much for this. I was wondering where the extra wires to the Y and C terminals went to, and now I know! Now I'm wondering what the ballast screwed on top of my furnace that's hooked up to the C and R terminals is for. Plugs into 4 prongs where the output air ducts are connected.
Thanks for your video, help me a lot how to connect my new smart thermostat, I have little issues because my fan never stop and I have this fan in automatic, when I turn the heater off works but the fan is always working, what you think I did wrong.
This is a great explanation, thanks for this. Two questions for you -- 1). I have two wires in my thermostat (W and Rh) and a jumper between Rh and Rc. Why is the jumper there, what purpose does it serve? (Heat only steam boiler) And, 2). If I wanted to use a Nest thermostat, would I simply need to upgrade to a 3-wire and connect C from thermostat to C on the boiler's electrical box?
Excellent video!. I'm in the middle of doing reno. I relocated the furnace. I don't have new ductwork yet. I still have some of the old stuff.Can I run the furnace without ductwork? Maybe till spring.
Very nice. Now I know why I have to 24VAC on red within my Nest thermostat. With 5" of snow on my heat pump and I am in a wheelchair. This could be fun. Where is the squirrel cage in line of the electrical side?
thank you sir. I HAD A PROBLEM WITH MY "smart thermostat and I had to figure out what all the connections meant...... et voila problem fixed thank to you. I needed to figure out the C=common wire did and how to work around it to giv eto the thermostat. what is wrong is that the Smart thermostat does not need power via the C wire but instead a negative.... once you find that out that hooking it up is easy. thank you again Sir. also I know now how the trigger for the AC works. great stuff
I saw your video, it was really helpful and I was thinking that maybe with your knowledge you could help me with my problem. Do you have any idea if I could connect two thermostats on a single stage heating and cooling? My idea is to install one tsat downstairs and one upstairs to have the chance to select (via software or at least a manual switch) which thermostat to be in charge of the HVAC. For your information I have just one manual damper (which closes or open the up floor duct), so the idea is not to do a zoning but to have control of the temperature on the floor I am regardless what the temperature is on the other floor. Just as an example to be clear: If ambient temperature is 18°C and I'm using downstairs tstat (with set point 20°C), upstairs will be 25°C but the system should continue working. Only the downstair tstat should lead. By the way, I'm from Argentina and I have already bought 2 Honeywell WiFi - RTH6580WF on a trip to USA (here are really really expensive!) Please let me know if I'm not clear enough. Thanks in advance. Regards.
+Michael Hemming maybe we can do some type of live video conferance so I can help you get your furnace figured out. We can try google hangouts this weekend
What if you do not have 24 volts at R and C on the block but you do on the transformer. Also have an error with five blinking lights. This occurred after a freeze up.
I have an electronic ignition fireplace that ignites a pilot. It has a control module . it has multiple connections coming from remote control receiver, battery relay, and a battery pack. The control module has two connections labeled pilot connectors. Labeled I and S on the wiring diagram. I want to install a thermostat like on a heating unit. It seems I need to connect the thermostat to the control module at I and S terminals to send a signal to light the pilot. Am I in the ballpark on this?
Please clarify... at 4:47 did you MEAN TO SAY... so when you call for heat, the thermostat will send out voltage W & G? (heat AND BLOWER/FAN?) I am an amateur, so this is a REAL question, not a smart remark. FYI I'm not sure if this matters, but I am asking in reference to a gas furnace. It just seems like common sense that it would call for the W & blower also (just like it does when set for AC). Your fast reply on this matter would be greatly appreciated.
Great videos been learning electric and hvac systems due to myy furnace failing. Was wondering how u check volts on furnace t-stat without a common wire. I know red should be 24v and W if heat is on, im having trouble getting my furnace to turn on at all. Need to know how to check double pole breakers inside furnace to make sure im getting proper V there and on t-stat. Thank u in advance and wonderful job on the tutorials.
Thank you for your video. - The wire coming out a/c compressor doesn't matter which one i connect to Y or C? - There is no wire hook up to my Thermostat do i still connect wire from comp to C ?
Great!!! add: in call for cooling if you have G energized but no 24V in Y , what seems to be the problem, R and Y has no 24V but the rest has 24V, R-C , R-G ...
trying to install a Wi-Fi honeywell thermostat but I only have 4 wires so I was going to use g wire as the c common but I got down to my furnace and the y wire is in the c wire place. so why would this be set up like this? can this be because we also have an electric plenum heater wired into the system as well?
I have a Honeywell thermostat with 4 wires connected with two batteries in the thermostat. The C terminal is not connected. Is it true that if I connect the C terminal to the transformer inside the air handler control panel I would not need the batteries to run the thermostat. As is the batteries have to be replaced constantly. How does one connect the C terminal to avoid using the batteries. The thermostat controls AC outside unit, heating blower inside unit, and the fan.
Hi on this video can u pls tell me witch colour wire go with each letter . Ex w white y yellow is R ( power ) read and is C ( common ) blue? . Can u pls tell me if this color code will be in Uk to for daikin and mitssubishi ? Thank u
I was trying to install a new 5 wires thermostat replacing an old 4 wires. I used extra wire as c wire but the furnace terminal board side already has a wires attached to it(C and Y), which runs to out side compressor unit. when I attached the new run c wire to this c terminal it is blowing out my 3 amp fuse. where should I connect the c wire of the new thermostat then?
Great video to understand the low voltage side. I an working on a heat pump that is not pulling in the contactor on the outdoor condenser unit when calling for cooling. I have a few things I'm scratching my head about. 1. I am getting 30V from the (R) Red and C (Common) it is a 24 Volt system, does this mean my transformer needs replaced? 2. When I check the W (White) to C (Common) when asking for cooling I am only getting 15V and it is also showing 15V when not asking for cooling (turn thermostat above room temperature). Is there something I am missing? Thanks for all your help so far.
the 24v transformer will produce a voltage between 24v-30v. That is normal and most produce around 28v AC. If you measure the voltage across 2 points and only get 15v that tells me you are only seeing voltage from 1 side of the transformer (either R or C. Most likely R side). You need the relay in the thermostat to make the connection on G,Y,W ect to C in order to get a complete 24V connection. When that takes place, the 24 volt relays will switch on and supply 110/220 vac to the outside unit/inside fan/heat strip depending. I am not a HVAC tech. I just love everything electric and worked on it from 9 years old until age 39. Very fun stuff!
Great video, thanks, on your diagram, when the unit is off, before setting the temp on the thermostat, which letter would be NO and NC contacts? Thanks
Great video Guy.. I do have a question that I cant seem to figure out why my new Goodman MVC96 furnace blower fan shuts off as soon as I switch the thermostat to cool mode but the condenser does start up fine. Because of no blower fan circulation the TXV and service port start freezing up immediately so I cant even get to setting sub cooling . I have the 2 condenser wires hooked to Y & C on the furnace control board but when set the thermostat to cool it shut off the blower fan. Blower fan also wont run in the ON or Auto position when set to cool but does work in heat and fan only mode.??? Any suggestions would be great. thanks
i hooked up a Honeywell thermostat TH421 ,when i put it to HOLD It goes to my set temp but then keeps running and running it wont shut off unless i turn it to OFF. What would make this happen?
Please help! How do I run brand new power to an ac unit?? I'm remodeling a house and the guys that demoed the place tore out the previous wires. I have no idea how to run power from a box on the ouside to the inside. All the breakers are already full so I don't know what to do.
very nice explanations,I'm learning too,I have a question I wanted to install a timer for my chiller or airhandler unit,in my working place it's 230 volt but I'm not sure if what types,we have a old 30 yrsold unit carrier
Buy a timer at the big box store that is used for controlling a hot water heater. Just make sure the amp rating on the timer is the same or exceeds the breaker amp rating that feeds power to the air handler.
I bought a new thermostat and went to install it, but there was no "C" terminal but I have a common (blue) wire. I dont know where to put my common wire, and I can't get the thermostat to run. I am trying to run heat and air if that helps. If anyone knows anything please help me.
How would a thermostat without a Common terminal receive electricity in order to send signals out back to the circuit board? Simply battery power? Or are there old analog ones that use some type of different metals that generate a small amount of voltage?
Yes, if it has batteries, it uses the energy from battery to energize relay(s) inside thermostat to connect R 24vAC to desired terminal (function). The old thermostats used contact switches filled with mercury that are conductive.
sir i have a question if u dont mind ...i am working in ksa as a HVAC tech ..here we use 24 v circuit ...in pakege ac we must be use 3 contactor 1 for blower and 2 contactor for 2 compraser ...some time i face a prb like... when we start unit from thermostate 2 contector working normal but when turnd on 2nd compraser the therd one contactor not get proper voltege ... some time at blower blower contacter voltege get down around about 17 or 18 v ... if i give it power from trance diractly it is work properly ...but with thermostate not working good ..replacing wire trance or thermostate no have banifate .... how we can fix this prb ...
I have a heat pump and when I call for cooling mode it is still in heat the 4 ways valve doesn't change In the winter season I changed the thermostat and I got warm air so now in the summer season I calling for cool air and I still getting warm air I don't know maybe I installed wrong the thermostat
i just went from an old to a new and on heat it was turning on the ac and the heat i took the blue one off and now it works just heat but what do i do to fix it
You got off to a slow start, but when you got rolling it was terrific. It was a clear explanation of the circuits involved and helps a lot in troubleshooting a thermostat problem. Nice work and thank you.
Amazing! I just graduates from HVAC trade and this video is equivalent to a week of lecture in my class. Thanks a lot! You are my hero!
Graduated*
so if i have an apprenticeship, i should just watch these
Your have cleared up years of confusion for me with this Thank you for taking the time to make it.
You are very welcome. Please feel free to request video content.
I owe you a beer or several. If you are ever in Minneapolis let me know. Your explanation was what i needed to fix the wiring mess in my furnace. THANK YOU. Now my AC works and my pregnant wife will be less uncomfortable.
Love your videos! As an electrical engineer grad but more into business now, I don't use to much electrical engineer. You have great videos to brush up on engineering aspects. Keep it up love your video education on electrical engineer!
this is an excellent video. I usually end up installing a lot of lutron or crestron thermostats, and this really explains what's happening plus troubleshooting.
You are the HVAC Legend from today !
Sadly I was falling asleep but good explanation in in an AC repair class RN and IM still learning even my teacher said this video needs more enthusiasm
Lots of video's Ive watched show how to wire, but not the theory of operation. Yours was well done. thank you!
I installed my first thermostat watching your CZcams video, thanks a million!!
You are very welcome!
@@GuyBrown
I am about to open the cover on a unit;
I worked up to setting the condenser myself without supervision but did not become proficient - zero time actually - at any of the inside of the unit; I installed 4-wire mechanical T-Stat per *Terry's* directions; He has many decades doing this and now works at LP - which is a fast-paced major shop in the county so he knows his stuff;
We robbed the T-Stat from a building to get tenant's area heated;
I hooked up 3 of the wires by unmistakable color-code and there was only one wire left so I attached it then failed to pull cardboard cover for shipping which I did on a call-back then tried the fan and the blower came on but I get hot customer
( he is a contractor ~ worked at BMW shop and has his own mechanical tools )
telling me the unit is not heating;
I have emailed the supplier with PN's to get a wiring diagram but looks to be a very common style of the era prior to "heat pumps"
I have ¼-million hours with only one scar so I can open the unit in relative safety - it is dangling wires that I did not install so I have to be x-tra careful not to break anything that is working and can really use your oversight;
My opinion is, a good teacher.
+Gotchaplumber Gotchahvac thank you!
This is so interesting. Electrical troubleshooting of any kind (including auto) gets my attention every time.
It's a great skillset to have.
This video is very fanatics and helpful, thanks.
Starting school for this soon. So safe to say that if the furnace doesn't run. Check W to C and if you have 24 vilts. Then that means the stats good. No 24 Volts from W to C and stats bad? as long as there's 24 v from R to C.
Thank you for the video. A while ago I changed my wires and when the summer hit my condenser unit did not go on. Thanks to this video I was able to pinpoint the 2 wires that needed to be connected and now it is working.
Thank you for a straight forward simply explained video. It really helped me. Thanks
Your Talk is studious , I Took notes , Thanx
The green wire is for the air handler unit fan motor relay only, the yellow wire is for the outside condenser unit.
The yellow wire energizes the compressor contactor, the fan motor is conected in the same contact.
If the compressor works,but the fan motor fails, the capacitor may be damaged,defective,or the fan motor may have an open winding, most common problem with an old fan motor is the capacitor.
i'm way beyond this but still enjoyed watching. good video!
Hello I Have been doing home wiring for years (110-220) in them but never certified and i am learning all there is about the symbols and all. I am going for an electricians apprenticeship with our local union hall . I would love to watch and learn all you have to teach. I thank you for these videos and more if they are out there .
+Thomas Kokensparger that's great. Thanks for watching.
Thanks so much for this. I was wondering where the extra wires to the Y and C terminals went to, and now I know! Now I'm wondering what the ballast screwed on top of my furnace that's hooked up to the C and R terminals is for. Plugs into 4 prongs where the output air ducts are connected.
Thank you so much for your ,time is a great explanation very easy to understand, thank you master I started dealing with this .thank you.
+Rigo Lainez thank you!
Thank you so much because of your video and explanation I was able to fix my problem. 😊
Thank you. Please feel free to suggest a video you would like me to make. Thanks for watching!!!
Very helpful information and explanation. Thank very much.
It is a great explanation how it is wired...excellent job ... A+
Thanks Guy , great explanation.
Nice of you to do these videos.
Thanks for your video, help me a lot how to connect my new smart thermostat, I have little issues because my fan never stop and I have this fan in automatic, when I turn the heater off works but the fan is always working, what you think I did wrong.
Great job buddy and thanks for the free lessons
This is a great explanation, thanks for this. Two questions for you -- 1). I have two wires in my thermostat (W and Rh) and a jumper between Rh and Rc. Why is the jumper there, what purpose does it serve? (Heat only steam boiler) And, 2). If I wanted to use a Nest thermostat, would I simply need to upgrade to a 3-wire and connect C from thermostat to C on the boiler's electrical box?
Great video made simple and easy to follow.
THANKS MAN YOUR THE BEST...
Excellent video!. I'm in the middle of doing reno. I relocated the furnace. I don't have new ductwork yet. I still have some of the old stuff.Can I run the furnace without ductwork? Maybe till spring.
gracias por el video amigo viva sudamerica
Very nice. Now I know why I have to 24VAC on red within my Nest thermostat. With 5" of snow on my heat pump and I am in a wheelchair. This could be fun. Where is the squirrel cage in line of the electrical side?
thank you sir. I HAD A PROBLEM WITH MY "smart thermostat and I had to figure out what all the connections meant...... et voila problem fixed thank to you. I needed to figure out the C=common wire did and how to work around it to giv eto the thermostat. what is wrong is that the Smart thermostat does not need power via the C wire but instead a negative.... once you find that out that hooking it up is easy. thank you again Sir. also I know now how the trigger for the AC works. great stuff
+Mau Gri thank you!
Mau Gri u7
Thanks for your explanation guy it makes a lot of sense. I will subscribe to your Chanel all your videos are really helpful
Thanks! This is what I have been looking for.
Thank you. Please feel free to suggest a video you would like me to make. Thanks for watching!!!
Teach them colors to identify, red-R w-white y-yellow g-green c-brown/black
+Michael Lee I don't like to use colors to identify because everyone does it differently. If I say yellow for Y and they see blue... And so on...
I get 24v from red and green ,no reading on red and blue, what seems to be the problem? Blue is neutral.
I saw your video, it was really helpful and I was thinking that maybe with your knowledge you could help me with my problem.
Do you have any idea if I could connect two thermostats on a single stage heating and cooling?
My idea is to install one tsat downstairs and one upstairs to have the chance to select (via software or at least a manual switch) which thermostat to be in charge of the HVAC.
For your information I have just one manual damper (which closes or open the up floor duct), so the idea is not to do a zoning but to have control of the temperature on the floor I am regardless what the temperature is on the other floor.
Just as an example to be clear: If ambient temperature is 18°C and I'm using downstairs tstat (with set point 20°C), upstairs will be 25°C but the system should continue working. Only the downstair tstat should lead.
By the way, I'm from Argentina and I have already bought 2 Honeywell WiFi - RTH6580WF on a trip to USA (here are really really expensive!)
Please let me know if I'm not clear enough.
Thanks in advance.
Regards.
the name of the furnace is williamson gravity fed gas saver furnace
+Michael Hemming maybe we can do some type of live video conferance so I can help you get your furnace figured out. We can try google hangouts this weekend
What if you do not have 24 volts at R and C on the block but you do on the transformer. Also have an error with five blinking lights. This occurred after a freeze up.
?
Thanks for this great explanation!
I like this series - great information
Thank you
thanks!
I'm installing a Honeywell 7 Day Programmable Thermostat. My old thermostat has a violet wire, what do I do with it?
thanks for the explanation very useful.
I have an electronic ignition fireplace that ignites a pilot. It has a control module . it has multiple connections coming from remote control receiver, battery relay, and a battery pack. The control module has two connections labeled pilot connectors. Labeled I and S on the wiring diagram. I want to install a thermostat like on a heating unit. It seems I need to connect the thermostat to the control module at I and S terminals to send a signal to light the pilot. Am I in the ballpark on this?
Please clarify... at 4:47 did you MEAN TO SAY... so when you call for heat, the thermostat will send out voltage W & G? (heat AND BLOWER/FAN?) I am an amateur, so this is a REAL question, not a smart remark. FYI I'm not sure if this matters, but I am asking in reference to a gas furnace. It just seems like common sense that it would call for the W & blower also (just like it does when set for AC). Your fast reply on this matter would be greatly appreciated.
Great videos been learning electric and hvac systems due to myy furnace failing. Was wondering how u check volts on furnace t-stat without a common wire. I know red should be 24v and W if heat is on, im having trouble getting my furnace to turn on at all. Need to know how to check double pole breakers inside furnace to make sure im getting proper V there and on t-stat. Thank u in advance and wonderful job on the tutorials.
+Dustin Hacker thanks man! Let me know want you want me to make a video on.
Very helpful
Very good info .
thank you so much doing good job keep going ....
goad blesss n more power....
Awesome 👍 thanks
thank you for this video.. Very Helpful..
can i put C in mainbroad to C in thermaltake broad and put it to C in tranformer (neutral) then hook it to chassic (ground)
This is what ive been waiting for! Very informative
Thank you for your video.
- The wire coming out a/c compressor doesn't matter which one i connect to Y or C?
- There is no wire hook up to my Thermostat do i still connect wire from comp to C ?
What is the deductible for your homeowners insurance. It might be cheaper to hire an hvac tech .
Thank you.
Great!!! add: in call for cooling if you have G energized but no 24V in Y , what seems to be the problem, R and Y has no 24V but the rest has 24V, R-C , R-G ...
If you don't have 24v then that means it's closed which power is energized. So your calling for cooling then Y & R would be 0v
Thanks for this video. Very informative & well explained breakdown. Keep 'em coming👍🏽
trying to install a Wi-Fi honeywell thermostat but I only have 4 wires so I was going to use g wire as the c common but I got down to my furnace and the y wire is in the c wire place. so why would this be set up like this? can this be because we also have an electric plenum heater wired into the system as well?
Very helpful. thank you.
Thank you. Please send any video suggestions you may have. Thanks for watching.
I have a Honeywell thermostat with 4 wires connected with two batteries in the thermostat. The C terminal is not connected. Is it true that if I connect the C terminal to the transformer inside the air handler control panel I would not need the batteries to run the thermostat. As is the batteries have to be replaced constantly. How does one connect the C terminal to avoid using the batteries. The thermostat controls AC outside unit, heating blower inside unit, and the fan.
Hi on this video can u pls tell me witch colour wire go with each letter . Ex w white y yellow is R ( power ) read and is C ( common ) blue? . Can u pls tell me if this color code will be in Uk to for daikin and mitssubishi ? Thank u
I was trying to install a new 5 wires thermostat replacing an old 4 wires.
I used extra wire as c wire but the furnace terminal board side already has a wires attached to it(C and Y), which runs to out side compressor unit. when I attached the new run c wire to this c terminal it is blowing out my 3 amp fuse.
where should I connect the c wire of the new thermostat then?
Great series!!! But what about the CONDENSER FAN? Did I miss something?
Thank you for the nice video!
Great video to understand the low voltage side. I an working on a heat pump that is not pulling in the contactor on the outdoor condenser unit when calling for cooling. I have a few things I'm scratching my head about. 1. I am getting 30V from the (R) Red and C (Common) it is a 24 Volt system, does this mean my transformer needs replaced? 2. When I check the W (White) to C (Common) when asking for cooling I am only getting 15V and it is also showing 15V when not asking for cooling (turn thermostat above room temperature). Is there something I am missing? Thanks for all your help so far.
the 24v transformer will produce a voltage between 24v-30v. That is normal and most produce around 28v AC. If you measure the voltage across 2 points and only get 15v that tells me you are only seeing voltage from 1 side of the transformer (either R or C. Most likely R side). You need the relay in the thermostat to make the connection on G,Y,W ect to C in order to get a complete 24V connection. When that takes place, the 24 volt relays will switch on and supply 110/220 vac to the outside unit/inside fan/heat strip depending. I am not a HVAC tech. I just love everything electric and worked on it from 9 years old until age 39. Very fun stuff!
way understandable then school thanks
Thank you guys!
Great video, thanks, on your diagram, when the unit is off, before setting the temp on the thermostat, which letter would be NO and NC contacts? Thanks
fantastic sir thank you very much
Great video Guy.. I do have a question that I cant seem to figure out why my new Goodman MVC96 furnace blower fan shuts off as soon as I switch the thermostat to cool mode but the condenser does start up fine. Because of no blower fan circulation the TXV and service port start freezing up immediately so I cant even get to setting sub cooling . I have the 2 condenser wires hooked to Y & C on the furnace control board but when set the thermostat to cool it shut off the blower fan. Blower fan also wont run in the ON or Auto position when set to cool but does work in heat and fan only mode.??? Any suggestions would be great. thanks
Unwire the tstat and jump out the terminals at the furnace and check for proper operation. Sounds like a stat issue.
Thanks man. Really helped!
If I don't have an air conditioner can I leave the Y without a wire?
i hooked up a Honeywell thermostat TH421 ,when i put it to HOLD It goes to my set temp but then keeps running and running it wont shut off unless i turn it to OFF. What would make this happen?
Thxs. Good video.
Thank you!
thank you very much sir , u oblige us by posting this kind of lovely videos ,,thx again
Please help! How do I run brand new power to an ac unit?? I'm remodeling a house and the guys that demoed the place tore out the previous wires. I have no idea how to run power from a box on the ouside to the inside. All the breakers are already full so I don't know what to do.
gotcha
. great videos man I appreciate them
very nice explanations,I'm learning too,I have a question I wanted to install a timer for my chiller or airhandler unit,in my working place it's 230 volt but I'm not sure if what types,we have a old 30 yrsold unit carrier
Buy a timer at the big box store that is used for controlling a hot water heater. Just make sure the amp rating on the timer is the same or exceeds the breaker amp rating that feeds power to the air handler.
I am working on a very old houe, the 5th wire is brown, can I assume it works as the green wire?
God bless you dude.
Let me know if you would like to see more vids on anything
can you do a video to do troubleshooting in the outside union
Great video
So the yellow wire goes out to the contractor on the outside unit?
If there is no common wire, does the troubleshooting for it change? or still use your lead on common?
I just made a video to answer your question. It will be uploaded soon. Thanks
WELL DONE
That guy looks darn familiar. He's one of them guys you've seen before but can't place him.
inbredagogo Seen him on youtub...LOL...Thanks for watching!!!
Great explanation guy ,I have a question. What happens if I set the t stay in cool mode and fan is at the on position.
+Samuel Aguilar fan will run and the ac will run when the stat calls for cooling.
I bought a new thermostat and went to install it, but there was no "C" terminal but I have a common (blue) wire. I dont know where to put my common wire, and I can't get the thermostat to run. I am trying to run heat and air if that helps. If anyone knows anything please help me.
Nice video
How would a thermostat without a Common terminal receive electricity in order to send signals out back to the circuit board? Simply battery power? Or are there old analog ones that use some type of different metals that generate a small amount of voltage?
Yes, if it has batteries, it uses the energy from battery to energize relay(s) inside thermostat to connect R 24vAC to desired terminal (function). The old thermostats used contact switches filled with mercury that are conductive.
sir i have a question if u dont mind ...i am working in ksa as a HVAC tech ..here we use 24 v circuit ...in pakege ac we must be use 3 contactor 1 for blower and 2 contactor for 2 compraser ...some time i face a prb like... when we start unit from thermostate 2 contector working normal but when turnd on 2nd compraser the therd one contactor not get proper voltege ... some time at blower blower contacter voltege get down around about 17 or 18 v ... if i give it power from trance diractly it is work properly ...but with thermostate not working good ..replacing wire trance or thermostate no have banifate .... how we can fix this prb ...
good stuff. enjoyed the vid!
Great help thanks👌🏽
I have a heat pump and when I call for cooling mode it is still in heat the 4 ways valve doesn't change In the winter season I changed the thermostat and I got warm air so now in the summer season
I calling for cool air and I still getting warm air I don't know maybe I installed wrong the thermostat
did you check to see if the reversing valve is getting power? it may be stuck or bad.
Thanks man looking forward to seeing more..GOD bless you
+daren sanders Thanks for watching!
i just went from an old to a new and on heat it was turning on the ac and the heat i took the blue one off and now it works just heat but what do i do to fix it
+EDLBZ I'll need you to take a picture or two so I can see for myself.