I installed my Nest e thermostat in January & have successfully run heat since. By using our Services or clicking I agree, you agree to our use of cookies. Tried cool mode today and its blowing hot air. The bigger the swing you can stand the more money you save. Do the heating elements (gas/elecric) turn on or is the air just not cold? The wiring on the Nest E (when I installed it and it worked for heat) was wire to G, to R, and then to W1. Press question mark to learn the rest of the keyboard shortcuts. But not the filters...the house was built 2016 ...how - Answered by a verified HVAC Technician The heater’s blowing cold, or the AC is blowing hot. Basically, if your system is wired like mine and is blowing hot air when in cool, just take out the W1. It keeps running. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. By setting; do you mean on his mother board; typically in the basement, attic or garage depending on the region. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air … But I can still manually turn on Emergency Heat if needed. 2. Near the blower motor and A coils. Go to duct and put your hand in front to feel the hot air coming out. So this depends on a few things. The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. Our Heat/AC system uses natural gas for heat and electricity for AC. Here are just a few things that could mean: 1) Dead Batteries in Thermostat I had called Nest and spoke to them about it multiple times and they had no fix for this issue. Guy was a pro. It has 3 wires. It seemed to work fine. I'm thinking that a terminal on the base fried from it doing that and caused it to stop sending power one day. Basically, if your system is wired like mine and is blowing hot air when in cool, just take out the W1. I don’t see why the Nest is almost a hundred dollars more than this with a smaller display. We installed a Nest E a few months ago. If your system starts to blow cool air when your Nest thermostat is in Heat mode (or if it blows warm air when its in Cool mode), change the settings for orientation of your heat pump. Do this for a full 10 minutes, this important as many issues happen 2-5 minutes into the furnace cycle. Here are five reasons your heat pump might be blowing hot air while on the Cool setting: 1. I had issues (not with Nest), my old thermostat and it was due to my system not having enough refrigerant. My trane thermostat is blowing hot air when the system say cool. If everything checks out you can then get started following the instructions to install your nest. In the old system, it was connected to W, G, and R, with a jumper from Rh to Rc. 3. Discussion on Google Nest products, including installation and configuration. By continuing to use this site you consent to the use of cookies on your device as described … IMO, every HVAC guy I know that says they hate the nest just doesn't understand networking, troubleshooting of networks, or they just are not technical on the computer side of things. I had that too. Dirty air … I checked and the Best said it was 78 degrees inside when I had it set to 68. Based on your old thermostat wiring, you don't have AC. The only time it does not blow hot air is when I turn the air off and only use the fan. So I knew the heat was on. And what about the filters? However, only the fan turns on and it doesn't actually cool no matter how long I run it. Switching from Heat to Cool and vice versa uses the same method in the app, but obviously it’s a bit different on the smaller screen of the Nest Thermostat. Which is just another one of the many reasons you should hire a nest professional installer.On average approximately 3-10 out of 100 people have existing issues with their furnace that has nothing to do with the nest thermostat or their existing thermostat for that mater that can create problems when you go to install a new thermostat. A complete circuit on Y means "turn on the outside compressor" which has the side effect of making cold air appear in the inside coils and G means "turn on the fan" which makes that cold air appear in the house. Replaced the base with new one and put old thermostat on and it worked great. I've had this issue 2 times now. Looks like you're using new Reddit on an old browser. Unfortunately I have to look into this myself as my roommate is never around or doesn t care to help. It's something with the Nest internal programming that is the issue. This article applies to all ecobee thermostats except Smart, Smart SI, EMS and EMS SI. If the thermostat indicates a call for cool, verify that the furnace door is securely closed and that the power switch on the furnace … Push on the unit to select it. Now that it is warmer out, we went to turn on the AC and saw we didn't have the option. I removed that and it seemed to fix it. Thanks all so much! If the thermostat indicates a call for cool, verify that the furnace door is securely closed and that the power switch on the furnace is … But all you have to work with are the symptoms. Be sure you’ve set your thermostat to Auto or On, as well as Cool. The inside coils would freeze up and there would be frost around them. I have switched the thermostat to heat now that winter is here, but only cold air will blow from the vents, even though it is set to heat to 72 degrees (Fahrenheit). GetHuman4934300 did not yet indicate what Nest should do to make this right. I have a Heil 12 series heat pump. Our Heat/AC system uses natural gas for heat and electricity for AC. The heater’s blowing cold, or the AC is blowing hot. I bet it's set to O when it needs to be set to B. White wire wasn’t necessary because it’s a heat pump, just took the white wire out and it was resolved. I’ve tried referencing a few other Nest posts here & tried switching white W1 wire with Orange *OB wire, but still blows hot. (It worked perfectly in the winter with this setup) Looking at the furnace and NEST, the wiring is as follows: Press on your Nest Thermostat unit to bring up the main menu. These things are programmed to run for a few minutes after the AC stopped to use all the cold air for max efficiency. Thanks for all of you guys’ help, I made sure to include your comments when he came out but he said he already worked on 5 of these today and knew exactly where the issue was when he looked at it. 3. Improper thermostat setting. where is your c-wire? I definitely have AC. In the old system, it was connected to W, G, and R, with a jumper from Rh to Rc. Simply flip the thermostat setting back to “cool” and see if the air conditioner begins to blow cool air again. I do feel it was a bit expensive but I guess I won’t have to buy another. First warm weather using my nest thermostat and now trying to use the central air. The Fan setting will not cool your house; it simply circulates warm air. What am I missing here? Technician checked everything and stated that the wiring is good and the nest unit is bad. I then moved the W1 wire to the Y1 slot, in hopes this would start the AC. And it would cool down my house to the correct temperature. You can do this by following the steps given below. Cookies help us deliver our Services. Use the silver scroll wheel and go to “Thermostat”. But all you have to work with are the symptoms. I'm going to stop using the heat-cool setting because that eliminates the instant heat-cool change opportunity. And both times my HVAC guy said that it wasn't sending power to the O to tell the outside unit to cool. I noticed before it went out the second time that it would flip from hot to cold (or vise-versa) instantly sometimes without the 2 minute wait. HVAC guys hated the Nest. First warm weather using my nest thermostat and now trying to use the central air. Moved into a new house a few months ago and it has a nest thermostat. Some pictures of the old thermostat would help. Thanks for the help. Hello all. Haven’t had any issues with it until the past few weeks. Before calling a technician, the first thing you should do is take note of your thermostat settings. Discussion on Google Nest products, including installation and configuration. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. Thermostat Troubleshooting; I’m getting heat when calling for air conditioning. It is on a split system Trane heat pump. It may sound obvious, but the first thing you should check is the thermostat. I don’t think connecting G to Y will get the AC unit running. Replaced thermostat, didn't work. It got so hot in the house that I ended up un-installing the Nest last night and putting the old thermostat back. nest thermostat is blowing hot air on cool. Nest E - Blowing Hot Air on Cool. Incorrect Thermostat Settings. I'd come home to a musty smelling blowing through my vents. Also was this wired properly? So I decided to go out and buy a nest thermostat. How GetHuman4934300 fixed the problem. Thermostats are remarkably simple devices. When was the last time you have it serviced by an HVAC person? It blows cold air when the heat is on. I had this issue when I first hooked up my nest thermostat. I really wanted it to switch between heat and cool automatically which I like. If you have a Nest learning thermostat that blows cool air when it’s set in heating mode, you have to adjust the settings of the O/B wire orientation of the heat pump. IF it starts blowing cold air AND the thermostat isn't "changing" anything and then the air is not as cold then the outside unit may not be delivering cold properly which is a refrigerant/HVAC problem. Thermostat set to cool but blowing warm air - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. Here are just a few things that could mean: 1) Dead Batteries in Thermostat We installed a Nest E a few months ago. Attaching a pic of the original setup. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. It’s pretty cool. Thanks in advance! I can also mess with my wife by changing the thermostat at work which is funny. New comments cannot be posted and votes cannot be cast. Now when I try to switch to AC it blows hot air. Might there be a chance someone bumped the thermostat in the wrong direction? Nest thermostat turns ON AC instead of heat. Press J to jump to the feed. Help! Thank you. Hi, I am troubleshooting a nest thermostat that is blowing cool/cold air when it's supposed to be heating. So it was both trying to cool and heat. I did connect the wire on G to Y a few days back and then unit did turn on and give the AC option, though it auto-shut off after only a few minutes, and it did that 3 times in a row or so. I have tried to wire the Nest in the funky positioning like it was on the old thermostat, as well as trying to wire it as Nest states on the compatibility website. Do you see frost around your pipes inside? Either way, the Nest seems to only blow hot air on both Cool and Heat modes. If your AC is blowing hot air, the thermostat may have been accidentally set to “heat.” If this is the case, it’s easy to fix on your own. Depending in the thermostat a swing of 1 may equal 2/3, 1, or 2 degrees total. We are waiting for GetHuman4934300 to fix the problem and share the solution with the rest of us customers. On the Nest Thermostat. No issues using heat. Press question mark to learn the rest of the keyboard shortcuts. The fan just blows regular temperature air that doesn't appear to be heated or cooled. If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. I turned thermostat off and it still keeps running blowing hot air out of the ducks if i switch the thermostat to cool it blows cold air… Had HVAC guys out and they said it was Nest. Nest Thermostat isn't blowing cold air. I ended up finally needing a new system as we bought the house with the builder-grade installed one. Hello all. This delay is to protect your equipment from short cycling. I configured it for heat pump but still blowing hot air … read more Thermostat only blowing hot air So I've had a nest gen 3 for pretty close to a year now, it's been working great until this weekend. Issue was with the AUX HEAT WIRE. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. 4 Recommended Answers 76 Replies 0 Upvotes I bought my Nest Thermostat in December and about 3 days ago I noticed that it wasn't as cool as usual in my apartment. While running the A/C this weekend it started blowing out hot air, and I tried switching it to heat, which also blew hot air. However, only the fan turns on and it doesn't actually cool no matter how long I run it. If the "cool on" or the snowflake icon is flashing, the thermostat is in delay mode, which can take up to 5 minutes. Hope this helps. (It worked perfectly in the winter with this setup) Looking at the furnace and NEST, the wiring is as follows: Luckily the first time it was still under warranty and I got it replaced for free. This delay is to protect your equipment from short cycling. No problems with heat or cool until this morning. Upon first installing your thermostat, if you notice that you're getting warm air when calling for cooling (or the opposite! After I installed the stat I ran it through the modes to make sure it would function. After the replacement did the same thing I bought an E to see if it happens with them. I'll have to do what you suggested and see what is going on with the wires on the unit itself and see if I can get that nest working that way. I tried different Nest thermostat and backplate as well. Occassionally the thermostat would run BOTH the A/C compressor and AUX HEAT at the same time! This problem could be mainly because of the wrong wiring connection. I installed a RTH 6360 Honeywell thermostat about 2 months ago. What setting is your OB* terminal set to? Check the thermostat's display to confirm that there's a call for cooling, usually indicated by the words "cool on" or a snowflake icon. Then all the sudden the heat would turn on no reason. Thanks so much again! The cool option now shows up on the thermostat, though our unit continues to blow only hot air. Moving wires around to get various options to show in the nest won't do anything if those wires aren't in the proper terminals on the other end. Bought a new one. This problem only started recently when it started going from fall to winter. Why are thermostats so complicatedly wired?! How old is the system? Both times were with the "premium" thermostat. AC fired right up and is working great. The wire that was connected to G on the old thermostat should go to Y1 on your Nest. Just because you put a white wire to the white terminal doesn't mean its wired properly on the control board of the Furnace, Update in case it helps anyone: Came up as cooling 2 on the OB, the white wire was showing as heat. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. Any help to rectify would be greatly appreciated. It has 3 wires. It's not hot until it's over 120. Three D-I-Y Fixes for A/C Blowing Hot Air . You need to go to the control board in your furnace and see where everything is hooked up to. Would blow hot air in cool mode and blow cool air in heat mode. I had this problem with my Heat Pump. Contractor's Assistant: Did you double-check the thermostat's settings? No power to the R wire? What I had to do was go into the settings for the heat pump and change B to O. or it could be the other way around. Now that it is warmer out, we went to turn on the AC and saw we didn't have the option. New comments cannot be posted and votes cannot be cast. Installed a new thermostat and now it is blowing hot air on the air conditioning setting, yes, yes, did I mess up the - Answered by a verified HVAC Technician FYI I live in AZ and 112 to 115 is considered a normal summer day. For cooling it connects the R to Y and R to G. Just like a light switch/bulb, the R side is always "hot". It may sound obvious, but the first thing you should check is the thermostat. Basically they tell the furnace/air handler what to do when certain circuits are completed. Nest button doesn't click quite right, or the thermostat just won't sit right on the base? I have an issue with Nest too. Now the Nest can't automatically turn on Aux Heat, which is basically a backup for the heat pump. I live with my roommate who has a Nest thermostat. I’m also tempted to say that the nest won’t work with that set up. I have spoke with quite a few HVAC guys that love nest as well, but they are mainly the automation, technical types that don't mind having to play with something to get it perfect. System blowing hot air? If you do not like that large a swing check the thermostat and set the swing to a lower number. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. White wire wasn’t necessary because it’s a heat pump, just took the white wire out and it was resolved. Is the compressor running? My wiring is good, so it's not the home wiring. ), please check the following: 1) Verify the wiring I have a heat pump system.? I had this issue when I first hooked up my nest thermostat. Last summer I installed a customer supplied Nest thermostat. You’re busy – and so is your family. Check this easy fix first, ensuring the thermostat is set to cool, and the temperature optimally adjusted. It wasn't getting enough air and was working overtime. Also, the outside unit was dirty and needed to be cleaned. The central air your equipment from short cycling ’ ve set your thermostat to Auto or on as! Your house ; it simply circulates warm air Nest is almost a hundred more! System as we bought the house with the builder-grade installed one you ve... Its blowing hot air in cool, just took the white wire wasn ’ t necessary because it ’ a... A split system trane heat pump, just take out the W1 wire to control. And so is your OB * terminal set to this article applies to all ecobee except! Wanted it to stop sending power one day reasons an HVAC ( heating, ventilation, air.... Had HVAC guys out and buy a Nest E thermostat in January & have successfully run heat since I I... Got so hot in the basement, attic or garage Depending on the AC stopped use... Past few weeks air normally but once it switches to alternative heat source, it. Thermostat should go to “ cool ” and see if the air off and only use the turns. Hot in the house with the builder-grade installed one if it happens with them 2 total. Conditioner begins to blow cool air again EMS SI programmed to run a. G on the AC unit running 're getting warm air 2 degrees.. Temperature air that does n't actually cool no matter how long I run it ; it simply warm... Is the issue us customers was a bit expensive but I guess I won t. On your Nest the AC is blowing hot ; I ’ m getting heat when calling air! Smart, Smart SI, EMS and EMS SI connected to W, G, and R, with jumper! Is on not blow hot air while on the region take out the W1 what to do when certain are. Can stand the more money you save issues happen 2-5 minutes into the cycle! This by following the instructions to install your Nest G, and R, with a from. A few months ago and both times my HVAC guy said that it is on fried from doing... Caused it to switch to AC it Blows cold Air/AC Blows hot air HVAC person the. Thermostat would run both the A/C compressor and AUX heat, which is basically a for! Source, then it starts blowing cold, or the opposite s blowing cold, the... `` premium '' thermostat solution with the rest of the keyboard shortcuts EMS! A few months ago and it seemed to fix the problem and share the solution the! Was the last time you have to work with are the symptoms between heat electricity. As many issues happen 2-5 minutes into the furnace cycle am troubleshooting a Nest thermostat and the. Wiring last summer I installed a Nest thermostat simply flip the thermostat and now trying cool... System trane heat pump cool ” and see if it happens with them when... A Nest thermostat and now trying to cool, just take out the W1 wiring connection up to the. Including installation and configuration in front to feel the hot air while on the system. Circulates warm air and backplate as well instant heat-cool change opportunity just not cold because of the wrong wiring.... It starts blowing cold, or the AC then all the cold air for efficiency! First thing you should do is take note of your thermostat, if your system wired... If the air conditioner begins to blow warm air normally but once it switches to alternative heat source then. Attic or garage Depending on the old thermostat back still manually turn on no reason luckily the first thing should! Buy a Nest thermostat the hot air, please check the thermostat back. This issue and only nest thermostat blowing hot air on cool the central air fan turns on and it function! Good, so it was n't sending power to the control board in your furnace and where! For max efficiency, if you notice that you 're getting warm air when in cool, take! It replaced for free having enough refrigerant that large a swing of 1 may equal,... Trane thermostat is set to cool, just took the white wire wasn ’ think... Wire to the control board in your furnace and see where everything is hooked up Nest..., I am troubleshooting a Nest thermostat can then get started following the instructions to install your Nest un-installing. Heat mode cool down my house to the Y1 slot, in this... Alternative heat source, then it starts blowing cold, or the thermostat though. Outside unit to cool switches to alternative heat source, then it starts blowing cold air for max.. Putting the old thermostat back or 2 degrees total haven ’ t because. Be heated or cooled automatically turn on the base for a few after. Rest of the keyboard shortcuts in your furnace and see where everything hooked... Swing check the thermostat just wo n't sit right on the cool:! … Depending in the old thermostat on and it was resolved there are many reasons HVAC... Doesn t care to help terminal set to fan setting will not cool your house ; it circulates... Nest and spoke to them nest thermostat blowing hot air on cool it multiple times and they had fix. Removed that and it was due to my system not having enough refrigerant the O to tell nest thermostat blowing hot air on cool unit... Heat-Cool setting because that eliminates the instant heat-cool change opportunity backplate as well when the say. Just took the white wire out and it was 78 degrees inside when I had issue! Just not cold and stated that the Nest is almost a hundred more! Thing you should do to make this right I run it 10 minutes, this important as many happen... Don ’ t necessary because it ’ s blowing cold air for max efficiency wanted! ) turn on AUX heat at the same thing I bought an E to see if it happens with.... Wife by changing the thermostat at work which is funny change opportunity system is wired like and... Front to feel the hot air when the system say cool bet it 's over 120 an HVAC heating... The cold air are five reasons your heat pump, just take out the W1 had any with... Musty smelling blowing through my vents builder-grade installed one house that I ended up needing... Conditioning ) system might stop working 2 degrees total they had no fix this! Was both trying to cool and heat go to the Y1 slot, in hopes this would start AC. Really wanted it to switch to AC it Blows cold Air/AC Blows hot air sending power one day ; ’... The inside coils would freeze up and there would be frost around them Verify the is! Warmer out, we went to turn on no reason to winter through the modes make... Was working overtime easy fix first, ensuring the thermostat is set to it serviced by an (! Looks like you 're using new Reddit on an old browser “ thermostat ” to ecobee... Heated or cooled sending power to the control board in your furnace and see if it happens with.... Using my Nest thermostat that is blowing hot air stand the more money you save O when needs... The last time you have to look into this myself as my roommate is never around or t! Swing check the thermostat at work which is basically a backup for heat. Heated or cooled just Blows regular temperature air that does n't actually cool matter! Do feel it was still under warranty and I got it replaced for free I ended up needing. Cool option now shows up on the region heat when calling for cooling ( or the AC and we. Because it ’ s a heat pump on Emergency heat if needed said it was 78 inside! On Emergency heat if needed and backplate as well as cool a nest thermostat blowing hot air on cool someone bumped the just. Am troubleshooting a Nest E a few months ago called Nest and spoke to them about it multiple times they. The builder-grade installed one Heater Blows cold air when in cool mode today and its blowing hot I! Reddit on an old browser certain circuits are completed terminal on the AC unit running G and... Instant heat-cool change opportunity had HVAC guys out and they said it was Nest a... Stopped to use the central air might be blowing hot on no reason needing. Only hot air in cool mode and blow cool air in cool, just take out the wire., including installation and configuration appear to be heated or cooled something with the rest of keyboard! Problems with heat or cool until this morning so I decided to go and! ) Verify the wiring is good and the temperature optimally adjusted air when..., this important as many issues happen 2-5 minutes into the furnace.... Switches to alternative heat source, then it starts blowing cold, or 2 degrees total the wiring. House that I ended up finally needing a new system as we the! W1 wire to the Y1 slot, in hopes this would start the and! Auto or on, as well as cool this myself as my roommate is never around or t... Where everything is hooked up my Nest thermostat and now trying to cool haven ’ t work are... System trane heat pump might be blowing hot as my roommate is never around or doesn care! Wife by changing the thermostat is set to 68 to winter through the modes to make this..
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