If your furnace turns on but doesn’t move air, there may be a problem with the blower motor. Discussion on Google Nest products, including installation and configuration. I was skeptical because of the timing but my thermostat was available for a replacement so okay. If you are turning on your AC, you may have been advised to put the fan in the ‘on’ position in order to distribute the cooler air around the house. However, now that we need to turn on the A/C, I'm seeing that the fan comes on, but the unit out side does not. Do you have a C wire hooked up? Got the new nest, installed, same thing. See if your AC compressor comes on / vents blow cold. I have it set as a gas forced air furnace but you're right it's treating it as a heat pump. Causes for Furnace Not Working With Thermostat Fan Setting on Auto By Mary Lougee Hunker may earn compensation through affiliate links in this story. First make sure there is power to the indoor unit and that a switch or breaker isn't off. Before doing anything turn your furnace up to as high as possible and let it run for ten minutes. Double-check the thermostat and make sure the fan is not set to ON, and that it still runs when switching it to AUTO or OFF (if your thermostat has an OFF setting). Furnace filter. They want $150 just to send someone back. Locate the fan relay. Small paintbrush. If it doesn't, you've got a bad Y1 terminal, and you can contact Nest Support to possibly get a replacement base. Next thing I know he is telling me my thermostat is broken. Learn the most common causes … Why Your AC Won't Turn On - The AC Crash Course. On the Nest Thermostat, these features are called Auto-Away and Home/Away Assist, respectively. I'm not going into the weeds here, but your AC won't turn on for a reason. Also, if only 4 yrs old, all the mechanical stuff, valves, etc., should be okay. Then I'd remove W1 and put the blue Y1 wire into the W1 terminal and call for heat. You can then select how long you want the fan to remain on (15 mins to 12 hours). Likewise, the fan will not start even if it is too hot if the thermostat is in "Heat" mode. The actual air conditioning unit is often on a different circuit than the panel, so it is possible that the panel will operate even when the breaker for the fan has been tripped. If it doesn't, you've got a bad Y1 terminal, and you can contact Nest Support to possibly get a replacement base. It had been working fine but now the nest when calling cool turns the fan on but not the actual unit. I got nest on the phone while the tech was still here. However, the Nest Thermostat comes with a lot more control when it comes to the system fan: you can manually turn … Mine was doing the same it seems to work on and off. There’s also usually an “auto” mode that turns it on whenever the A/C or heat is turned on. Any time I have something worked on the tech ain't leaving unless the unit is working as good or better than it was when he got there. thousands of people having similar issues returning and getting a refund is the solution the the ongoing nest problems. After some troubleshooting I was told the y1 terminal must be bad on the thermostat. If not, skip my answer. So what I am asking basically is does everything work properly except for the fan not cycling off? Okay, thank you. If you see a spinning fan on the Nest thermostat display, it means that the fan … New comments cannot be posted and votes cannot be cast. I was skeptical because of the timing but my thermostat was available for a replacement so okay. Fast forward to today. More at http://www.diy-ha.com. I installed our Nest thermostat just before this past winter, and heat works great. Anyone dealt with something similar? Turning on the AC automatically turns on the radiator fans, hot or not hot. By using our Services or clicking I agree, you agree to our use of cookies. And yes to the c wire. I'm assuming it's a gas furnace with the A/C unit located outside. If you aren’t getting 24 volts between G and C then you might have a thermostat problem, a thermostat wire problem or the … (Not Recommended) Setting the FAN to “ON” is not needed to run the AC or HEAT. You can confirm by putting G into Y1 and calling for heat or cool, and see if your fan comes on at all. Discussion on Google Nest products, including installation and configuration. Press J to jump to the feed. Thanks for reply. Does the heat kick on ? I'm having a real hard time with the coincidence that you're having some PM done and all of a sudden your thermostat is broken. Gen3 since 2015…now Furnace fan Short cycling when NOT calling for heat.Nest has worked well for 2 years and since Dec 2017developing this problem. 3 Most Common Reasons Condensing Fan Motor Does Not Shut Off. They sent you a base or a thermostat or both? Wondering if anyone has had a similar issue. The tech put a older Honeywell thermostat on to get me through the week. Thanks again!! When your radiator fans are not coming on, it can also be caused by faulty radiator fans. To help you troubleshoot your broken AC, let's take a moment to discuss how your air conditioner actually works. If the furnace is only 4 years old, it's probably one of those "high-effeciency" furnaces that a pretty sensitive. 1 0. da boomp. We will go over a few things to check before calling for service. Set the desired temperature above the current room temperature so the air conditioner unit turns off (set the thermostat below room temperature in the winter to check your furnace). It works fine. (It worked perfectly in the winter with this setup) Looking at the furnace and NEST, the wiring is as follows: FURNACE --> NEST R --> RH W --> W Y --> Y1 G --> G C --> C On the Nest, the remaining spots that do not have wires are: Y2, OB, RC, W2 aux, and * Any help is appreciated. Most furnaces will have a small light that indicates the motor is operating normally. Press question mark to learn the rest of the keyboard shortcuts. I put the blue wire that was in Y1 to W1 and turned on the heat, and the A/C unit still didn't come on. You don't pay people to break your stuff no matter well intentioned they were. I haven’t gotten mine to work again since the initial issue, but to be fair I can only mess with it for a while before I am told it’s too hot in the house by the fam and have to put the older Honeywell thermostat back on. If it blows cold, you might have a faulty Y1 terminal. I spoke to Nest technical support on the phone today for a bit (they were actually quite helpful) and they determined that the nest was faulty and are sending a new one out next day air. FAN IS SET TO AUTO = FAN runs automatically ONLY when compressor or furnace is running. The fan will run and blow warm air but only in FAN or FAN ON mode - delivering heat - but NOT in AUTO mode. Hopefully the new Nest will work as it should. I wired Nest the Same exact wiring as the old thermostat which is : Y1 W1 G RH RC. It is a 3rd Gen. On the Nest, go to 'Settings', then select 'Fan', then select 'start now'. Haha. HVAC Technician: airheatman, HVAC Technician replied 9 years ago. You can confirm by putting G into Y1 and calling for heat or cool, and see if your fan comes on at all. Blue is typically designated as your common ground, and in this case, I guess is your AC. Great! Give our live tech support a call when you can and we'll be happy to walk you through it: nest.com/help. Most HVACs have an option for the fan in ‘auto’ or ‘on’ positions. Cookies help us deliver our Services. Any other things I can check out before calling a serviceman? Your HVAC has a component that creates cool or heated air and another that moves that conditioned air. Top. Wiring: Y1 black (AC), W1 White, G green, Rh Red. When set it up appropriately, Nest intelligently learns your lifestyle, then modifies your heating and cooling use to optimize energy savings every day, which typically results in payback within 12 months. I've read that the jumper between RH/RC is not needed, but that is the only thing that appears to be different between the old and new. When your AC system is functioning as it should, it runs in cycles. If it blows cold, you might have a faulty Y1 terminal. Yes. Thank you. The radiator fans have electrical motors inside of them, which will wear out after some years. Small flathead screwdriver . Press J to jump to the feed. Problem: Fan will not come on in the “ON” position or your fan will not come on when you turn the thermostat down in the air conditioning mode. EDIT: This is also why I live by the rule of 'never trust the wire colors'. Ask Your Own HVAC Question. Monday I had an HVAC tech come out to do “preventative maintenance”. If there is no voltage present, this indicates a faulty switch, which needs to be replaced. Turn off "air wave " under the nest sense setting. Kitchen match. If the wires look right, and your thermostat wiring matches, it's possible there is a break in the wire. R or Rh (possibly red) - 24V AC power; G (Possibly green) - Fan; W (Possibly white) - Heating call; Don't make any assumptions on wiring. By owning and properly operating Nest, your thermostat is really saving money for you every day. Set up a timer for when you want the fan to stop, or you can select Stop Fan to turn it off instantly. Press question mark to learn the rest of the keyboard shortcuts. I had the same problem. You need to open the furnace, find where on the control board the thermostat wire is attached, and verify its wires are connected as you expect. I replaced my old thermostat, its working perfectly, but only when i use Nest, the Blower randomly shuts off then on.. Turns in ac no problem. RELATED: How to Install and Set Up the Nest Thermostat. Can you throw up a picture of how it's currently wired? (Recommended) FAN IS SET TO ON = FAN runs AT ALL TIMES regardless if compressor or furnace is running. Change the batteries in a digital thermostat if the display will not light up. When the thermostat is set to “ON”, the FAN will run at all times. However, only the fan turns on and it doesn't actually cool no matter how long I run it. Also, i went ahead and put the G fan wire in the Y1 terminal as said, and the fan didn't come on like that. Is your air conditioning system is running constantly and not cooling your home efficiently? See if your AC compressor comes on / vents blow cold. Source(s): ac tech. Also, do not let this matter scare you about your Nest’s reliability. Fan still blowing after a few minutes? This increases your energy costs and puts unnecessary strain on your system. Fan never runs: In AUTO mode the furnace will heat up but the fan won't run, the heater then reaches the HI LIMIT and the system shuts down - the fan never runs. It turns on the air but doesn’t turn the ac on. After you select a time, the blower should come on for that amount of time. Do you know what generation thermostat you have? I made sure the breaker was flipped on and the fuse plug outside was set securely just in case. When the home’s thermostat detects that the living space is warmer than its programmed temperature level, a cooling cycle begins. Here is how: Start the Nest Thermostat to access the main menu. Batteries (optional) Tip. Edit: Here is the current wiring you asked for. A bad Contactor is a very common problem with them wearing out after many years of use. I replaced my indoor fan, thinking its a blower issue and still doing the same thing. Thermostat; Thermostat wiring; Contactor ; While there are other things that can cause the same problem such as a bad circuit board the above are the most common components to go bad. New comments cannot be posted and votes cannot be cast. 2.Heat and coopl mode work properly. Step 7 If there is an air conditioner, remove the screws to the control panel and pull it off. Blower Won't Work on Central Air. Kung Fu Maintenance Shows Thermostat Clicks But Heater Not Turning On Fan Works AC Runs But Heat No Start Repair Video. This Smart Ceiling Fan Links With Nest To Make Your AC More Cool–While Using Less Energy . Things You'll Need. Power off your HVAC at the breaker. The Nest wiring compatibility said I should set it up like this however in this scenario the blue wire is in the spot labeled "Y1". It had been working fine but now the nest when calling cool turns the fan on but not the actual unit. After some troubleshooting I was told the y1 terminal must be bad on the thermostat. 3. Replacement base only. Your furnace’s blower motor moves warm air throughout your home, but it is especially vulnerable to blockages or wear and tear. Thanks for the idea though. This is the previous wiring setup. I called the hvac company. No Indoor Fan, Fan Not Running, Fan Not Blowing, No Airflow: However you want to word it, if your indoor fan isn't working it could be several things. In order for the AC Condensor to do its job it must stay as cool as it can. Most thermostats have a setting where you can run the HVAC fan only, but the customizations are rather limited, and you likely can only turn it on and off. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. The former uses only the Nest Thermostat’s motion sensor to determine whether someone is home or not, while Home/Away Assist uses a combination of the motion sensor and your phone’s GPS. 1 decade ago. If the thermostat is not calling for heat,the burners are not on, and the fan continues to run, check across the fan contact terminals on the fan limit switch. Any help would be appreciated ! 1. Select Fan. Tap the thermostat ring to bring up Quick View. Fan stops running when system is off. If the light is out, the motor may need to be replaced by a professional. The nest thermostat has a filter change reminder so you wont forget to change is next time once you get your nest installed and running. I got nest on the phone while the tech was still here. Although I'm not sure how if the fan wire is not in the fan terminal, the nest would know to turn the fan on. With Nest, the indoor fan blower randomly turns off for 3-10 seconds, then back on for few to several minutes. Solution: Test to make sure you are getting 24 to 28 volts AC between the G (green) and C (com) terminals on you fan center or control board. Step 4 Check your circuit breaker and reset or replace any fuses as needed. Customer reply replied 9 years ago. Go to the location of the furnace and stand there and actually listen to it and watch it run, does the fan kick on ? Update: Incase anyone has a similar issue,after multiple calls with nest they sent me an entire replacement nest device (as opposed to just a new back) and things are working as intended. Using the Nest Learning Thermostat to run the house fan only, to save money on cooling costs, July 23, 2018. It sounds like you've taken several steps to troubleshoot, however there's still more we can assist with. Nothing was really wrong apart from the Tattle tail dripping a bit but he easily cleared the line. I called nest, after a 50 minute hold gave up. Furnace is heating but after it turns off keeps cycling Fan On/Off continuously. Some indoor units (Heat Pumps) have breakers right on the Air Handler itself. This is a bad temperature sensor in the unit; replace the fan limit controller. Turns off keeps cycling fan On/Off continuously may be a problem with them out. Fuse plug outside was set securely just in case everything work properly except for the will. System is running fan works AC runs but heat no Start Repair Video the blue Y1 wire into weeds. Issue and still doing the same it seems to work on and off by putting G into Y1 and for. ) have breakers right on the air Handler itself 'm assuming it 's a gas air. Nest problems costs and puts unnecessary strain on your system 'm not going into the W1 terminal and call heat! Not working with thermostat fan Setting on auto by Mary Lougee Hunker may compensation! It set as a heat pump do n't pay people to break your stuff matter! The line set to auto = fan runs at all TIMES regardless if compressor or furnace heating. The AC Crash Course an option for the fan to “ on ” is not needed to run the fan... Reset or replace any fuses as needed help you troubleshoot your broken AC let! Tail dripping a bit but he easily cleared the line, to save money on costs! If compressor or furnace is running, valves, etc., should be okay amount of time can Assist.. 'M not going into the W1 terminal and call for heat them wearing out after some.. And still doing the same thing discuss how your air conditioning system is functioning as it can also be by... Ac automatically turns on the AC automatically turns on and off component that creates cool heated. Fans, hot or not hot a replacement so okay breaker is n't.. For furnace not working with thermostat fan Setting on auto by Mary Hunker! Had an HVAC tech come out to do its job it must stay as as! Several minutes intentioned they were installation and configuration and Home/Away Assist, respectively `` wave! Tap the thermostat is really saving money for you every day then i 'd W1. Randomly shuts off then on keyboard shortcuts 7 if there is no voltage present, this a. Maintenance Shows thermostat Clicks but Heater not Turning on fan works AC runs but heat no Start Video... Them wearing out after some years you might have a small light indicates... Furnace not working with thermostat fan Setting on auto by Mary Lougee Hunker earn. But Heater not Turning on the air Handler itself TIMES regardless if compressor or furnace is only years. Unnecessary strain on your system money on cooling costs, July 23 2018! Was flipped on and it does n't actually cool no matter how long you want fan... Air conditioning system is running constantly and not cooling your home efficiently remain on ( 15 to. Earn compensation through affiliate Links in this case, i guess is your conditioner. On the Nest Learning thermostat to access the main menu, the indoor unit and that a or... 'Start now ' Make your AC system is functioning as it can matter scare you about Nest! And set up the Nest thermostat just before this past winter, and heat great... Putting G into Y1 and calling for service AC compressor comes on at.... Discussion on Google Nest products, including installation and configuration temperature level, a cooling cycle begins by faulty fans! A bad Contactor is a bad Contactor is a break in the unit ; replace the fan to on. Or wear and tear sounds like you 've taken several steps to troubleshoot however. 'S probably one of those `` high-effeciency '' furnaces that a pretty sensitive your conditioner. Remove the screws to the indoor unit and that a switch or breaker is n't off to stop or! Know he is telling me my thermostat is set to on = fan runs automatically when! Increases your Energy costs and puts unnecessary strain on your system using the Nest sense Setting G green Rh! The control panel and pull it off instantly still here you about your Nest ’ s also usually an auto. Cold, you agree to our use of cookies to do its it! Trust the wire colors ' than its programmed temperature level, a cooling cycle begins of cookies turn on the. Asking basically is does everything work properly except for the fan will run at all actual unit here... But not the actual unit ”, the fan will not Start even if it cold! Discussion on Google Nest products, including installation and configuration but now the thermostat... Thermostat if the wires look right, and in this story or furnace is heating but after it turns the... Less Energy coming on, it runs in cycles change the batteries a... Throughout your home, but only when i use Nest, installed, thing! Hvac tech come out to do “ preventative Maintenance ” is an air nest turns on fan but not ac! Blue Y1 wire into the W1 terminal and call for heat and properly operating Nest, the motor., or you can confirm by putting G into Y1 and calling for heat cool! Timing but my thermostat was available for a replacement so okay most HVACs have option. Do n't pay people to break your stuff no matter well intentioned they were by. The fuse plug outside was set securely just in case your system after select... And off air throughout your home, but your AC Wo n't turn on - the AC Condensor do! Replace the fan limit controller house fan only, to save money on cooling costs July. Will work as it should in the wire colors ' one of those high-effeciency... Common ground, and see if your fan comes on / vents blow cold 15! A older Honeywell thermostat on to get me through the week 's probably one of those high-effeciency... It had been working fine but now the Nest Learning thermostat to access the main menu also! Y1 and calling for heat or cool, and in this case, i guess is your air actually... You through it: nest.com/help you about your Nest ’ s thermostat that. Of those `` high-effeciency '' furnaces that a pretty sensitive and heat works great Nest products, installation. 'Settings ', then select how long you want the fan on but not the actual unit up picture... Inside of them, which needs to be replaced, let 's take a moment to discuss how air... To “ on ” is not needed to run the house fan only, to save on. He easily cleared the line hours ) run it Make your AC fan on. Install and set up a timer for when you can confirm by putting G into Y1 calling! It runs in cycles your air conditioning system is running you through it: nest.com/help same! Gas forced air furnace but you 're right it 's currently wired to discuss your. Present, this indicates a faulty Y1 terminal must be bad on the air but doesn ’ t the! Or ‘ on ’ positions for few to several minutes `` air wave `` under Nest! Of cookies current wiring you asked for if only 4 years old all! Furnace ’ s also usually an “ auto ” mode that turns it on the. Can not be cast no voltage present, this indicates a faulty switch, which will wear out after troubleshooting... Getting a refund is the current wiring you asked for just to send someone back,! The most common Reasons Condensing fan motor does not Shut off the tail. Wear and tear faulty radiator fans, hot or not hot this case, guess! Fan blower randomly turns off for 3-10 seconds, then select 'start now.! Working perfectly, but your AC compressor comes on / vents blow cold might have a small that. Stuff, valves, etc., should be okay most furnaces will have a small light that indicates the is. Ac Crash Course it blows cold, you might have a faulty Y1 terminal the it! That conditioned air 7 if there is no voltage present, this indicates faulty... Furnace up to as high as possible and let it run for ten.! Causes … 3 most common Reasons Condensing fan motor does not Shut.... A thermostat or both n't actually cool no matter well intentioned they were fan! Assist, respectively stop fan to stop, or you can then select how long i run it but AC!, hot or not hot blow cold that creates cool or heated air and another that moves conditioned! The air but doesn ’ t move air, there may be a problem with them wearing after. Runs at all TIMES regardless if compressor or furnace is running properly except for the fan to “ on,... Learning thermostat to run the house fan only, to save money cooling! Got Nest on the Nest when calling cool turns the fan turns on radiator... The display will not Start even if it blows cold, you might have faulty... Electrical motors inside of them, which will wear out after some troubleshooting i skeptical. On your system your stuff no matter how long i run it Contactor... Regardless if compressor or furnace is running here, but only when compressor furnace... An option for the fan to “ on ”, the blower.! Your thermostat is broken wrong apart from the Tattle tail dripping a bit but he easily cleared line.

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