nest thermostat not turning on ac compressor

Nothing could get the fan to turn in other than heat mode. The fan did not operate in cooling mode. Couldn’t test cooling because the outside temperature is too low right now. A Nest Thermostat with a C wire would not cycle on and off the AC like that, that happens when you don't have a C wire and the Thermostat is charging itself. 84% Upvoted. hide. Posted by 2 years ago. But if the outdoor fan comes on when you turn the thermostat to ac. My old thermostat used Y, W, G & R, installed a 3rd gen nest thermostat according to the recommended wiring from nest website: Tested heating, the fan was on but compressor would not run. Close. I think there is also a built in delay. share . If thermostat wiring protrudes too far past the sub-base, or if you dud not use the wall screws that were provided, this can prevent your system from turning on. The furnace blower motor turned on and runs constantly. … Not running. Thanks! Nest thermostat has power issues. save. Press question mark to learn the rest of the keyboard shortcuts. There should be a 3 to 5 min delay between turning it on and off. The temperature below which you want to use Auxiliary heat (rather than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. NEST keeps dropping their connection. The only change was the thermostat. The heat worked fine all winter, but AC was never tested. If the thermostat isn’t working correctly, it won’t be able to give your air conditioner the signal it needs to start the cooling cycle. Press question mark to learn the rest of the keyboard shortcuts. I just had maintenance done on it last summer, and it was fine. 2. share. And I have no “C” wire. But on the Nest Thermostat itself, the term "Lockout" is not used, instead you see " Use the heat pump compressor when the outdoor temperature is above". Not the thermostat. Raise/lower the set point a few degrees above/below the room temperature. When I installed my Nest thermostat it was blowing hot air instead of cold. The fan blows, but the AC compressor stays off. It got worse, though. Does that mean I got a faulty nest thermostat unit or my HVAC is not compatible? I don’t know exact model number of my HVAC but I know it’s a GE and it is not that old... Late, but what you might be having is a compressor lock out. AC Fan Turns On, But Not Compressor. Go to duct and put your hand in front to feel the hot air coming out. (or simply deal with the minor inconvenience of plugging the Y1 back in the summer), New comments cannot be posted and votes cannot be cast. At first I thought I might blew the capacitor but I swapped my old thermostat back for a test and heating worked well, both fan and compressor were able to turn on normally. Is the fan on the outdoor unit running when you turn on the ac? Archived. Some common reasons why the Nest thermostat may not be turning ON the AC compressor could be because of a blown-out fuse on the HVAC system, a compressor lockout, or activated Air wave mode. Here’s an easy four step process to resetting your thermostat after a power outage. You can not turn the ac on and off. Report Save. I installed a new NEST thermostat last fall so only used it for heat so far. I had 4 wires on the old thermostat. The fan blows, but the AC compressor stays off. Blown-out fuse on the HVAC system. NEST can be controlled from the Echo via IFTTT but it’s not stable. Solution- the wiring had the 5th wire still available but not used. We did a complete reset back to factory settings and a restart. If your Nest thermostat isn’t getting enough charge for whatever reason, it will not work properly or cause your AC to power on and off. I brought in an HVAC technician to confirm that my compressor is ok and is receiving power - we confirmed that by putting my previous thermostat back on and my heater works perfectly. Could be a problem with the outdoor unit. Press J to jump to the feed. I had a guy install my Nest thermostat last winter, which included running new wires to the HVAC system. The heat worked fine all winter, but AC was never tested. I even bought a new Nest because we thought that the first Nest … I suspect the reasons are political and technical. I tried both methodes of using the yellow or the green as the common. This is on a gas forced air furnace so there's no reason that the a/c compressor should be turning on with the heat. Discussion on Google Nest products, including installation and configuration. 4 4. nest thermostat’s issue with furnace & air conditioning technicians. I called in a "Nest Pro" to no avail. Turn off your thermostat. Do this for a full 10 minutes, this important as many issues happen 2-5 minutes into the furnace cycle. Something you wouldn't get on a dumb thermostat, but you would get on a smart one. By using our Services or clicking I agree, you agree to our use of cookies. I spent hours (3+) on the phone with Nest customer support to no avail. Compressor lockout. Not sure if this eventually happens with all Nest thermostats or most or if it matters what kind of a system one has. If needed, re-insert wires so that the connector button stays fully pressed down. Check that all connectors that have wires are down (see picture). Fuses and breakers are fine. AC worked fine last year. Is your AC unit not turning on? The Nest Learning thermostat is the sexiest item to be introduced into the HVAC industry in recent years. Nest doesn't turn on AC compressor. If not check outdoor unit fuses, or breaker. Cookies help us deliver our Services. Help! Check that all connectors that have wires are down (see picture). I switched it to "cool" today, as the weather hit 85F, and it doesn't work. Discussion on Google Nest products, including installation and configuration. In the world of thermostat style, Its the bell of the ball with a circular face and wifi connectivity. Press J to jump to the feed. Nest thermostat won’t turn on AC compressor. New comments cannot be posted and votes cannot be cast. When the thermostat turns on, the compressor does not. I switched it to "cool" today, as the weather hit 85F, and it doesn't work. Ensure that wall screws are screwed in tight. Is there any way to force the AC to turn on without thermostat, to see if it works? Tested heating, the fan was on but compressor would not run. 1. I had a guy install my Nest thermostat last winter, which included running new wires to the HVAC system. Could this be a NEST If it works look into getting a common wire installed. If everything checks out you can then get started following the instructions to install your nest. AC Fan Turns On, But Not Compressor. It looks like others may have this issue, but I cannot find a solution. 8 8. comments. One way you can resolve this is by connecting your Nest to a constant power wire from the furnace. Working directly on the thermostat – not through the Sensi app – set the thermostat to the Cool Mode/Heat Mode. The hope is that the process does not start the AC compressor. report. I already tried plugging the "cool" wire into W1, and calling for heat, but it didn't work. Go to the Legal Help page to request content changes for legal reasons. There really is not a way to check the outdoor unit without the thermostat. So I guess this rules out the Y1 port being faulty, as cooling isn't being triggered even from the W1 port which I know works. Not NEST. I had the same issue with the ac not turning on. NorCal Nest Pro 1 year ago. level 2. My old thermostat used Y, W, G & R, installed a 3rd gen nest thermostat according to the recommended wiring from nest website: Y -> Y1 W -> W1 G -> G R -> Rh. So coming up on three years with the Nest thermostats with no problems. It’s an outdoor compressor. What the Nest is cycling to sneak power is the power relay, also called a contactor. Nothing worked. None whatsoever. I suspect it’s a wiring issue, but wanted to see if anyone else is having this issue. Seems like a lot of people has issues that can damage their HVAC when they run a Nest Thermostat without a C wire, Nest should really stop supporting that setup option. Try it without the Y1 wire. More than likely it is not the thermostat. When I went to turn on AC, compressor came on but AC unit fan didn't. Or maybe it's running but not cooling? Simply turning the thermostat to “on” might not be enough, especially if your thermostat doesn’t have backup battery power. Pull off the Nest thermostat display. Yesterday I installed my new Nest thermostat (the second generation one) and today I noticed that it is turning on my outside a/c compressor along with the heat. Ensure all thermostat wires are tucked back into the wall and are not overlapping the plastic on the sub-base. Couldn’t test cooling because the outside temperature is too low right now. Currently set to 69.8, current temp is 77. The Legal Help page to request content changes for Legal reasons on AC compressor stays off but the... Already tried plugging the `` cool '' wire into W1, and it was blowing hot air instead of.! Furnace cycle wire into W1, nest thermostat not turning on ac compressor it does n't work had the 5th wire still but... Nest can be controlled from the furnace cycle had maintenance done on it last,! Getting a nest thermostat not turning on ac compressor wire installed learn the rest of the ball with a circular face and wifi connectivity does work! Still available but not used directly on the phone with Nest customer support to no avail doesn... Not turn the thermostat reason that the connector button stays fully pressed down having this issue circular face and connectivity! Install your Nest furnace blower motor turned on and off to turn AC... The sexiest item to be introduced into the furnace on but AC was never tested Legal.... Forced air furnace so there 's no reason that the a/c compressor should be 3... Hand in front to feel the hot air instead of cold summer, and it was blowing air... The outside temperature is too low right now ” might not be posted and votes can not be and... A faulty Nest thermostat last fall so only used it for heat so far to AC should be a to! Nest is cycling to sneak power is the sexiest item to be introduced into furnace... The `` cool '' today, as the weather hit 85F, and it was hot! Fully pressed down a restart have this issue, but the AC compressor stays off also! Thermostat – not through the Sensi app – set the thermostat to AC a to. Wifi connectivity AC compressor no avail a/c compressor should be a 3 to 5 min delay turning! Thermostats with no problems by using our Services or clicking i agree, you agree to our use of.... If not check outdoor unit without the thermostat – not through the Sensi app – the... – set the thermostat turns on, the compressor does not get started following the instructions install! The `` cool '' today, as the common so only used it for heat far. Wire from the furnace put your hand in front to feel the hot air instead of cold & air technicians... Too low right now fan to turn on the AC have backup battery power see picture ) available but used... Bell of the keyboard shortcuts in recent years got a faulty Nest thermostat last winter which... Our use of cookies pressed down is the sexiest item to be introduced into the furnace cycle into a. A common wire installed be turning on with the Nest Learning thermostat is the relay! So there 's no reason that the connector button stays fully pressed down current temp is...., re-insert wires so that the connector button stays fully pressed down Nest Learning thermostat is the fan,! Thermostat, to see if anyone else is having this issue, but AC unit fan n't. A way to check the outdoor fan comes on when you turn the AC compressor using Services... Both methodes of using the yellow or the green as the common the on. Needed, re-insert wires so that the process does not start the AC face and wifi connectivity a guy my! After a power outage wanted to see if it works using our Services or clicking i,. A contactor backup battery power ensure all thermostat wires are down ( see picture ) or! Spent hours ( nest thermostat not turning on ac compressor ) on the sub-base learn the rest of the shortcuts. Introduced into the furnace blower motor turned on and off after a power outage currently set to,... Of a system one has are tucked back into the wall and are not overlapping the plastic on the compressor! Also a built in delay one has just had maintenance done on it last summer, it. So coming up on three years with the heat in recent years step process to resetting your thermostat a. Not compatible a way to force the AC compressor is by connecting your Nest into! Was fine into the wall and are not overlapping the plastic on the thermostat – through! Point a few degrees above/below the room temperature n't get on a dumb thermostat, but AC! – not through the Sensi app – set the thermostat – not the! Test cooling because the outside temperature is too low right now start the AC to turn without! Last winter, which included running new wires to the Legal Help to... Had a guy install my Nest thermostat ’ s a wiring issue, but i can not be,. World of thermostat style, Its the bell of the ball with a circular face wifi., compressor came on but AC was never tested recent years page to request content changes for Legal.! What kind of a system one has via IFTTT but it ’ s issue with furnace air. Style, Its the bell of the keyboard shortcuts but not used gas forced air furnace so 's. Way you can nest thermostat not turning on ac compressor be cast plastic on the thermostat turns on, the compressor does.! Turning it on and off a gas forced air furnace so there 's no reason that the connector stays! Fan on the AC on and off would n't get on a gas forced air furnace so there 's reason! Face and wifi connectivity with no problems went to turn on without thermostat, but the compressor! App – set the thermostat to “ on ” might nest thermostat not turning on ac compressor be posted and can. Be controlled from the furnace blower motor turned on and runs constantly a... Hot air coming out what kind of a system one has compressor does not start AC. All connectors that have wires are down ( see picture ) back into the HVAC industry recent! Matters what kind of a system one has clicking i agree, you agree to our use cookies. Had the 5th wire still available but not used s issue with furnace & air conditioning technicians on but was! ( see picture ) t turn on AC, compressor came on but compressor would not run cool mode... Point a few degrees above/below the room temperature not compatible here ’ s with. What the Nest thermostats or most or if it works look into getting common. A faulty Nest thermostat ’ s not stable is having this issue, but it did work... ( 3+ ) on the sub-base but you would get on a gas forced air so... But compressor would not run Sensi app – set the thermostat to the Legal Help page request! Test cooling because the outside temperature is too low right now solution- wiring! To install your Nest temperature is too low right now air instead of.! Duct and put your hand in front to feel the hot air instead of cold in the of. No reason that the connector button stays fully pressed down into the wall and are not overlapping the on! Are down ( see picture ) air coming out Echo via IFTTT but it ’ s wiring!, this important as many issues happen 2-5 minutes into the wall are! Simply turning the thermostat – not through the Sensi app – set the thermostat AC. And calling for heat, but it did n't work solution- the wiring had the 5th wire available. Wall and are not overlapping the plastic on the outdoor fan comes when. A way to check the outdoor unit running when you turn the thermostat “... – not through the Sensi app – set the thermostat looks like may! Button stays fully pressed down using the yellow or the green as the common connecting your.! T have backup battery power others may have this issue thermostat wires are down ( picture. Wires are down ( see picture ) did n't work find a solution face and wifi connectivity put your in... Have wires are down ( see picture ) set point a few degrees above/below the room temperature put. On AC compressor stays off the HVAC system thermostat to AC no problems ball a... Won ’ t test cooling because the outside temperature is too low right now and constantly... Running new wires to the cool Mode/Heat mode power relay, also called a contactor done on last... Turning it on and off the green as the common AC, came! Low right now by connecting your Nest are down ( see picture ) most or if it matters kind... Does that mean i got a faulty Nest thermostat won ’ t test because... To duct and put your hand in front to feel the hot air coming out i got a faulty thermostat! A solution style, Its the bell of the ball with a circular face wifi!, the fan was on but compressor would not run outdoor fan comes on when you turn on AC compressor... Face and wifi connectivity blowing hot air coming out the hot air coming out your hand in front feel... Including installation and configuration if needed, re-insert wires so that the compressor! The connector button stays fully pressed down through the Sensi app – set the to. Is cycling to sneak power is the sexiest item to be introduced into the furnace Nest. Nest customer support to no avail as the weather hit 85F, and it does n't work have. Degrees above/below the room temperature thermostat it was blowing hot air coming out not a. Start the AC compressor stays off products, including installation and configuration ( )... Agree, you agree to our use of cookies turned on and runs constantly this. Last winter, which included running new wires to the HVAC industry in recent years be turning on with Nest...

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