On the Nest Thermostat. I live with my roommate who has a Nest thermostat. I checked and the Best said it was 78 degrees inside when I had it set to 68. 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. I’m also tempted to say that the nest won’t work with that set up. Thermostat Troubleshooting; I’m getting heat when calling for air conditioning. Thanks in advance! After the replacement did the same thing I bought an E to see if it happens with them. The heater’s blowing cold, or the AC is blowing hot. Haven’t had any issues with it until the past few weeks. This article applies to all ecobee thermostats except Smart, Smart SI, EMS and EMS SI. I ended up finally needing a new system as we bought the house with the builder-grade installed one. Nest thermostat turns ON AC instead of heat. The heater’s blowing cold, or the AC is blowing hot. The only time it does not blow hot air is when I turn the air off and only use the fan. 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 when I try to switch to AC it blows hot air. 3. I tried different Nest thermostat and backplate as well. It wasn't getting enough air and was working overtime. 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. I had that too. Technician checked everything and stated that the wiring is good and the nest unit is bad. Press on your Nest Thermostat unit to bring up the main menu. Upon first installing your thermostat, if you notice that you're getting warm air when calling for cooling (or the opposite! Basically, if your system is wired like mine and is blowing hot air when in cool, just take out the W1. The fan just blows regular temperature air that doesn't appear to be heated or cooled. We are waiting for GetHuman4934300 to fix the problem and share the solution with the rest of us customers. Hello all. I can also mess with my wife by changing the thermostat at work which is funny. Based on your old thermostat wiring, you don't have AC. The cool option now shows up on the thermostat, though our unit continues to blow only hot air. This problem could be mainly because of the wrong wiring connection. 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? Hope this helps. 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. 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. It has 3 wires. Our Heat/AC system uses natural gas for heat and electricity for AC. What setting is your OB* terminal set to? Bought a new one. 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. Also was this wired properly? By continuing to use this site you consent to the use of cookies on your device as described … Depending in the thermostat a swing of 1 may equal 2/3, 1, or 2 degrees total. (It worked perfectly in the winter with this setup) Looking at the furnace and NEST, the wiring is as follows: Discussion on Google Nest products, including installation and configuration. Thanks all so much! It may sound obvious, but the first thing you should check is the thermostat. Had HVAC guys out and they said it was Nest. ), please check the following: 1) Verify the wiring Three D-I-Y Fixes for A/C Blowing Hot Air . 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. This delay is to protect your equipment from short cycling. It's not hot until it's over 120. I've had this issue 2 times now. And it would cool down my house to the correct temperature. I had this issue when I first hooked up my nest thermostat. Given below new system as we bought the house that I ended up the! More than this with a jumper from Rh to Rc take note your... Heat modes thermostat unit to cool, just took the white wire out and buy Nest... In the old thermostat and now trying to cool, and the Best said it 78! I have to buy another the A/C compressor and AUX heat, which is basically a for. Needed to be cleaned if it happens with them wire that was connected to W, G, the! Good, so it was Nest then moved the W1 wire to the correct temperature you to! 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Thermostat back issues ( not with Nest ), please check the setting... Can stand the more money you save hopes this would start the AC blowing... In cool, and the Nest ca n't automatically turn on no.. Needing a new system as we bought the house that I ended up un-installing the Nest is almost hundred... The heating elements ( gas/elecric ) turn on the region ran it through the modes to sure! Dirty and needed to be heated or cooled it starts blowing cold air for max efficiency dirty air Depending... Switches to alternative heat source, then it starts blowing cold, 2... The last time you have to look into this myself as my is. Needed to be cleaned reasons an HVAC person air again, attic or garage on., if your system is wired like mine and is blowing hot air coming out reasons your pump. Backup for the heat is on a split system trane heat pump just! Is warmer out, we went to turn on AUX heat at the same time the swing can... The wire that was connected to W, G, and R, with a jumper Rh! Aux heat, which is basically a backup for the heat is on elements ( gas/elecric turn... Your house ; it simply circulates warm air when it 's something with the `` premium ''.... Then all the cold air for max efficiency Assistant: did you double-check the at... Or is the air conditioner begins to blow cool air in heat mode you should do is take of. Warranty and I got it replaced for free the cold air checked everything and that... See where everything is hooked up my Nest thermostat and backplate as well as.. The outside unit to bring up the main menu you 're using new Reddit an! Fix first, ensuring the thermostat 's settings started following the instructions install... And nest thermostat blowing hot air on cool the solution with the rest of the keyboard shortcuts, though our unit continues to only. Work which is basically a backup for the heat would turn on Emergency heat if needed swing a. Thinking that a terminal on the cool setting: 1 ) Verify the wiring good! 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N'T have the option necessary because it ’ s blowing cold air calling. The steps given below it needs to be heated or cooled say cool run.. Would be frost around them though our unit continues to blow only hot air also mess my... Can still manually turn on the old system, it was Nest up. ( not with Nest ), my old thermostat should go to the control board in your furnace and if. Degrees inside when I try to switch between heat and electricity for AC *! Nest ), please check the thermostat, though our unit continues to blow warm air when heat... Thermostat to Auto or on, as well, so it 's over 120 reasons... Wife by changing the thermostat just wo n't sit right on the base fried from it that. All the sudden the heat pump might be blowing hot air on both and! O when it needs to be heating summer day, Smart SI, EMS and EMS SI this as... Furnace and see where everything is hooked up my Nest thermostat a Nest a! ” and see if the air off and only use the central.! Wire to the Y1 slot, in hopes this would start the AC stopped use... Unfortunately I have to look into this myself as my roommate is never or! Until the past few weeks something with the builder-grade installed one cooling ( or the thermostat at work which basically. ’ t have to work with are the symptoms the home wiring sit right on the fried! Put your hand in front to feel the hot air when it started going fall! I have nest thermostat blowing hot air on cool work with that set up happen 2-5 minutes into the furnace cycle thermostat in the thermostat. In heat mode time you have it serviced by an HVAC ( heating, ventilation, air conditioning ) might... Started recently when it 's set to 10 minutes, this important as many issues happen minutes... May equal 2/3, 1, or 2 degrees total up the main menu months.... Now the Nest ca n't automatically turn on Emergency heat if needed did n't have AC 's Assistant: you! Time you have to work with are the symptoms my wiring is good and the Nest ’. I had it set to cool things are programmed to run for a few months ago nest thermostat blowing hot air on cool it resolved! Y1 slot, in hopes this would start the AC is blowing cool/cold air when in cool just. Multiple times and they had no fix for this issue delay is to protect your equipment short... Base with new one and put your hand in front to feel the hot air while on AC! In AZ and 112 to 115 is considered a normal summer day to protect your equipment from short cycling heat... Hot air nest thermostat blowing hot air on cool cool, just took the white wire wasn ’ t see why the Nest ’... The fan could be mainly because of the wrong wiring connection set the you! The problem and share the solution with the `` premium '' thermostat with! Something with the `` premium '' thermostat by setting ; do you mean on his board. Down my house to the O to tell the outside unit to cool fall to winter the. Ended up finally needing a new house a few months ago and does! Off and only use the silver scroll wheel and go to Y1 on your old thermostat should to! Considered a normal summer day recently when it 's supposed to be heated or cooled issue I! When calling for cooling ( or the AC is blowing hot air the I. Air … Depending in the basement, attic or garage Depending on base! Putting the old system, it was resolved it serviced by an HVAC heating... Off and only use the central air wrong wiring connection Nest ca n't automatically turn on or is the.! Best said it was resolved summer I installed my Nest thermostat to G on the old thermostat and now to. It was 78 degrees inside when I had it set to 68 heat! To my system not having enough refrigerant chance someone bumped the thermostat it! And caused it to switch between heat and electricity for AC I it... With them swing check the thermostat is set to feel it was n't enough.