The confusion can cause the unit to display aux ON without actually engaging auxiliary heating. Nest Thermostat Blowing Hot Air on Cool After Installation Also, the white wire on the thermostat was connected to W2, but inside the air handler this wire goes to W1? AUXheat can cost about 2to 5times as much as running your heat pump. Have you ever noticed the phrase aux heat on your thermostat? You dont have to connect your Nest thermostat to your Wi-Fi network. Then, tap Heat Pump Balance. Because AUXheat is so expensive, running the heat pump longer can be cheaper than using AUX heat. All these can cause the thermostat to display misleading readings. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Therefore, the heat pump may no longer supply enough heat inside the house. If you go to condenser and with the system set to heat, touch the orange and yellow wire together. You can choose how much expensive AUX heat your system will use when your. Always make sure that the heat pump and auxiliary heating mechanisms are cleaned and maintained for optimal function. There are a few DIY fixes that can save you some money, but most repairs should be handled by a professional heat pump repair technician. Fix 3: Check the nest thermostat wiring. Model GMS80704BXCC. The same applies to gas furnaces. Thermostat Set to Heat but Blowing Cold Air | Honeywell Home Auxiliary (AUX) heat is a second source of heat that comes with some heat pump systems. Solution: Diagnose the thermostat. The exact value varies from one heat pump to the next. Anna Middleton Here are a few tips and tricks for dealing with auxiliary heat. If your unit and filter are free of debris, the problem could be low refrigerant levels. If you have a heat pump, you will not use a wire in the W terminal. All Rights Reserved. 12-27-2021 One system may not need to use AUX heating often, while another system one may need to use AUX to keep the system heating even if the Max Savings setting is selected. You need to check your thermostat wiring. And if your O/B terminal isnt connected, you probably have a conventional system, not a heat pump. marcusmoreno23, I'm dropping by to check if how's your Nest Learning Thermostat now? Its a plug that plugs right on to the solenoid. 2023 HVAC.com a Magenta Technologies LLC Company, All Rights Reserved, Frozen condensate drain: how to fix it yourself, https://www.hvac.com/troubleshooting/frozen-condensate-drain/, Should you cover roof vents in the winter? Nest 3rd Gen - Blowing Cold Air When Set to Heat : r/Nest - Reddit I've read through the posts but not many resolutions , so would appreciate any help!! Remember that the display on the thermostat an LED . May be something as simple as a switch or breaker is turned off. I also see the Blue, White, Yellow, and Brown wires traveling back out to the Heat Pump. Put a jumper between w2 and e and put the tstat back together. For more information, please see our I recently had to reset due to low battery & wifi issues. If you think you have a defective changeover valve, call an HVAC pro to come and take a look at your system. Check how to install a Nest thermostat, Rc 24VAC power from the cooling transformer, W2/AUX Heat Relay (Stage 2) / Auxiliary Heat Relay. This device is designed to measure the temperature of the air flowing out of the vents in your home. On the orientation configurations, if O is one that is highlighted, try changing it to B and vice versa. In mild climates, heat pumps are an energy-efficient way to heat and cool your home. 03-07-2022 As weve mentioned, auxiliary heating is a separate mechanism from the heat pump. To get the most out of Google Home, choose your Help Center: U.S. Help Center, U.K Help Center, Canada Help Center, Australia Help Center. No a/c, just a goodman gas furnace blowing into house thru vents. We hope that, with the above troubleshooting tips given, you have managed to fix your nest thermostat blowing cold on heat setting. I have a cable connected to the Y (I dont have a clue of what that is for) but I am freezing and the aire wont blow warm.. Air is blowing cold on heat mode, does someone have a clue? when I did that instead of heat coming on cold ai. This can happen for many reasons. If Itry to move the black cable to W1 then it thinks that it's gas and not electric. If you dont have a wire in the W2/AUX connector, you dont have AUX heat. Get an answer from an expert on the Google Home Help Forum. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. If the auxiliary heat source is engaged, but theres no heat coming from it, then theres a problem. You could try connecting the black wire to the W1 terminal and see if that changes anything. You can also identify dents, bends, and leaks in the ductwork early and address them before the heating season begins. Privacy Policy. Whats the indoor temperature? Most such systems are wired to a gas furnace. Finally, bends can also constrict the ductwork, limiting the amount of warm air that passes through. this time I put no heat pump.4. If you cant find your phone you can always make the same changes by using your thermostat. Ensure where your plumbing, ducting, and electrical wiring comes through the walls, floors, and ceilings is properly sealed. You need to find out for sure if you have a heat pump. Thermostat shows auxiliary heat and blows cold air The option is greyed out. Solution: Here, too, the first step is maintenance. If you can avoid using this type of heating for your home long-term, your energy bill and wallet will thank you. Since electric heating is the most expensive form of heating, some auxiliary heat systems employ dual-fuel systems to provide supplemental heating. The reasons why your thermostat is blowing cold air on heat setting include incorrect thermostat wiring, misconfigured reverse valve (if you have a heat pump system.) Its best to have it checked before temperatures take another dive. Aux heat typically comes on in extremely cold winters when outdoor temperature dips below 40F. If you are using a heat pump this should go into the OB/ terminal. For a 1st stage heat pump with AUX heat, the following are the terminals that must be connected for it to work properly: You can read more about Nest thermostat wiring for your specific heat pump here. Check to see if your thermostat is set to ON or AUTO. Run this function only when the temperature inside your home takes an extreme drop and turn it off when the temperature is within 3 degrees of your desired setting. Is the heat pump damaged? AUX heat can also start if the pump cant handle the outside heat on cold winter nights. For a 1st stage heat pump, these are the terminals that are supposed to be connected. Of course, the amount of heat generated also depends on the type of resistance wire. Typically furnaces (air handlers) are installed indoors, and heat pumps (air conditioners) are located outside. Also, if you happen to have a voltmeter, then you could test whether the Nest is signaling Aux heat by testing the voltage of the white wire (and blue) at the heat pump. So, you can tell if your system is a heat pump by: If you have a heat pump, your thermostat should blow cold air on cool mode. 1. Photos of old and new wiring attached. Thanks for reading. Add the orange wire to the bundle and it should blow the opposite of what it did without it. You can also identify dents, bends, and leaks in the ductwork early and address them before the heating season begins. One your thermostat wire(orange wire) is broken or open. When the heat pump is overwhelmed, the gas heater will switch on automatically and provide supplemental heat to keep you warm. The orientation settings on your nest thermostat switches between the heating and the cooling mode. Alternatively, get the model number and any other necessary label information on your system and look it up on the internet. You need to find out for sure if you have a heat pump. Emergency heat is used to give the heat pump a break and avoid system damage (plus, it will warm your home in sub-freezing temperatures). Here is a pic of a generic solenoid, the black cylinder is the solenoid. Auxiliary heat is a heating mechanism designed to fill the gap to keep you warm and cozy even when the heat pumps heating capacity diminishes. You'll need to manually set the / OB connector as your second. Ensure also that the end of the wire connecting to the O/B terminal is stripped enough to have proper contact with the terminal. Pull off your thermostats display. : The first thing you should do here is to check your thermostat. 04-24-2022 This type of system uses electricity and refrigerant to create a comfortable temperature within your home. An open Nest thermostat If your heat and cool are reversed on your Nest, it could be that the orientation is not set correctly (for heat pumps only). If Heat Pump Balance is enabled, you don't have to worry about setting the lockout Aux Heat Blowing Cold w/ Nest - Old Thermostat Works Fine After installing the Nest Thermostat, my system seems to be having trouble calling for Auxiliary Heat. 06:37 PM. 11:35 AM. Once you do that, your fan should only blow out air that is heated by your furnace. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Nest Thermostat blowing cold air - Google Nest Community Your thermostat is probably blowing the hot air because you use conventional heating (furnace). Save my name, email, and website in this browser for the next time I comment. Still need help? This heat pump thermostat setting means auxiliary heat is being used. After installing the Nest Thermostat, my system seems to be having trouble calling for Auxiliary Heat. If that works perfectly for heating, then try testing if cooling is working too by doing this: If your Nest thermostat is blowing warm air instead of cool, try changing the orientation of your thermostat. Were you able to try Patrick's suggestion above? Connect me with a local heat pump repair person. You can use a low-expansion spray foam or install house flashing where you find issues. 2) Incorrectly Configured Reverse valve. How To Fix a Facebook Account Temporarily Locked, How to Change the Location on a FireStick, How to Download Photos from Google Photos, How to Remove Netflix Recently Watched Shows, If no wire is present then you dont have AUX heat which means that the. Troubleshoot heat pump issues - Google Nest Help 2023 householdair. Seal air leaks around fireplaces, chimneys, furnaces, and water heaters with fire-resistant materials like sheet metal, sheetrock, or furnace cement caulk. Sometimes systems may need the C-wire to be installed to be compatible. Test your heating and cooling again to make sure the issue is resolved. The Nest Thermostat E supports one stage of heating, one stage of cooling, and a second stage of either heating or cooling. Your system can use AUX heat to help keep you comfortable in harsh weather or to help change the temperature in your home quickly. If it remains on, you may have a malfunction in your heat pump and need to call an HVAC service provider. There are two main types of auxiliary heating solutions; The majority of heat pumps use electric resistance coils built into the mini split to provide auxiliary heat. Click heat pump and see which configuration is currently there. Changing orientations between heating and cooling depend on your heat pump model. The O/B is just reversed and can be fixed by setting it correctly. Its not advisable to attempt DIY on auxiliary heat systems, especially gas heaters. I've tried switching the heat pump from B to O. Go to the home app and tap settings on the top right. Possible Conclusion 3: Your Heat Pump Is in Defrost Mode. If you feel air flow, but no heat or cool, you likely have incorrectly configured your thermostat for a conventional electric system instead of a heat pump. The higher the current, the higher the heat output. If the walls of your home are too cold and your heat pump is not powerful enough, AUX heat may be needed in order to make up the degrees. If cold air blows on heat and warm air blows on cool, then you have a heat pump. Nest Thermostat Keeps Using Aux Heat - How To Fix - Alphr Youll stay warm, but emergency heat mode will cause a noticeable spike in your electricity bill. Maybe theres a short circuit. After a few days of frustration and trying different Nest settings, I decided to open up the air handler and confirm the connections inside are correct. (~50s), but as it got colder (30s), the condenser has stopped trying to spin up. Why is my Heating not Working? - Honeywell Home Programmable smart thermostat that learns your schedule and the temperatures you like and programs itself to help you save energy and stay comfortable, Home/Away Assist automatically adjusts itself to an Eco Temperature after you leave so you dont heat or cool an empty home, Remote control lets family members change the temperature from anywhere on a phone laptop, or tablet[1], With Energy History just check your phone to see how much energy you used and why, or use Quick View on the thermostats display to reach Energy History, settings, or your schedule, Smart thermostat with HVAC monitoring which looks out for your heating and cooling systems; sends an alert if something doesnt seem right, along with helpful reminders to make maintenance easier[2], ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your systems compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page, The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, youll need a C wire or other compatible power accessory. Remember, your emergency heat is not automatic and will require you to physically turn it on and off. If you have a single stage heat pump, wire it accordingly. It will still work properly but you wont be able to use and configure the Heat Pump Balance feature. While the manufacturer says the C wire is not needed on many systems. This means that with the exception of unfortunate, unforeseen external interference, you can avoid using AUX heat to hit the target temperature all winter long. Check every wiring and fix any loose or bent wire. Now that we know where this problem lies- let's take a closer look at what may disrupt the ignition process. It is not uncommon for heat pumps heat and cool to be reversed. 11:27 AM On your Nest thermostat, the O/B terminal controls the changeover valve. You can change it from the Nest app or from your thermostat. If the filters are dirty, you can wash them or replace them. That being said when you provision the Nest you have to change it to energize in heating, or switch from O to B. I changed it back to O and no heat. Weather this cold means your heat pump is rendered useless. Then youll need to go down to your furnaces control board. However, because the system is in cooling mode . First off, dirty filters can constrict air passage into the duct system, meaning that very little warm air will come out into your rooms. Replace single-pane windows with more efficient double-pane windows. A changeover valve can become defective with the age of your system. If it is cold enough where you are, the heat pump may not be warm enough without emergency heat. Heat Pump Balance lets you select a level of comfort andsavings that you like: more comfort, more savings, or a balance between the two. Thanks for the response and I hope this helps others! When those freezing temperatures occur, auxiliary heat makes its seasonal debut. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Call 1-877-342-2087 To Find 24/7 HVAC Repair In Your Area. I've tried switching the heat pump from B to O. I have no experince in HVAC but I believe I have1 Stage Heat Pump with Aux heat and Emergency Heat. Our product reviews and recommendations are researched and backed by real buyers and industry experts, not dictated by our partners. Airflow in the ducts can be compromised for several reasons. Maybe youve even conformed on the thermostat that its ON. Hi there, As most of the posts out there when my thermostat is set to blow hot air but it blows cold air. If not, you may need to to a system reset. Although its not common, its also not unusual for auxiliary heat to misbehave or fail. So, let's see how you can fix it easily. Heat pumps work both as air conditioners and heaters. Nest thermostat blowing cold air in heat mode Cali2021 Community Member Options 12-26-2021 07:38 AM New install of Nest Learning Thermostat and we are getting cold air blowing. I did follow that diagram. This can help prevent false alarms in the future. Ive read through the posts but not many resolutions , so would appreciate any help!! As most of the posts out there when my thermostat is set to blow hot air but it blows cold air. Understanding your unit will help you recognize when aux heat and emergency heat are necessary and when they may indicate a system malfunction. When it gets extremely cold outside, the thermostat automatically switches on the resistance coils, which function just like any electric heater. Currently, AH runs, blowing cold air while thermostat says heating. Aux Heat Blowing Cold w/ Nest - Old Thermostat Works Fine : r/Nest - Reddit Is that air cold? Remember that the display on the thermostat an LED system that can malfunction. I installed a Nest thermostat and everything was working fine until I had to put the heat on in the winter. If your c-wire is missing, you can try out these 2 tips to sort out the problem: We hope this guide has helped you in one way or another. Auxiliary heat will automatically turn off when your home or environment has warmed up enough for your heat pump to function normally. Bring up your Nest app. 90% of all HP systems use O to energize in cooling not heating. A changeover valve is a device in your heat pump that reverses the flow of the refrigerant so your heat pump can function as both a heater and an air conditioner. To use Heat Pump Balance, your thermostat must also be connected to Wi-Fi. You need to be aware of what type of system you have and the type wiring that suits. So, a significant portion of the heat that would have gone into the house ends up in the defrost process, further reducing the heat that gets into the house. The heat pump is your homes primary heating source, but when the weather gets too cold, a secondary heating source is needed. If theres no wire in the O/B connector, your system is not configured as a heat pump. Solution: Theres only one solution here regular maintenance. Scan this QR code to download the app now. Often, you only realize the problem when you try to engage the aux heat function. Is it working appropriately? However, if the issue has already happened, your only option may be to switch off the heating system and call an HVAC technician. Choose between Max Savings and Off. New install of Nest Learning Thermostat and we are getting cold air blowing. Both auxiliary and emergency heat should be temporary settings. Click Continue, then select heat pump. If you touch the orange and yellow wire and nothing happens, your changeover valve is faulty, or disconnected. Lets connect you with a dealer! Check the wire If you weren't able to resolve the issue with the. Thermostat shows auxiliary heat and blows cold air You can pull the cover off the tstat if you have a w2 and e terminal. A substantial leak may divert the warm air elsewhere, perhaps outdoors, leaving you in the cold. Maybe you should confirm that the white wire is actually making good contact in the W2/Aux terminal. There is a good chance that the orientation for the thermostat is not set properly. While Nest manufacturer claims the thermostat is compatible with 95% of 24v volts systems. Maybe youre misled. Reason it blows opposite of what you're calling for is due to this manufacture energizes the HP changeover valve in Heating. : Here, too, the first step is maintenance. Unless your wiring is off, Nest systems rarely gives out AUX heat notifications for no reason. checked firmware and it says its current(6.2-22) I see the Yellow, Green, Brown, White, Red, and Blue wires are coming from the thermostat (it seems that orange and black are un-used). I doubt you'd have any problems leaving the wire disconnected. If its higher than 40F, you dont need heating, and the aux ON display was probably a false alarm. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The nest is wired correctly, however you need to provision to energize in heating or B like your old tstat. Loose wires can negatively affect how your thermostat operates. So, if its B that is highlighted then select 0 and if its the O that is highlighted select B. Learn about multistage heating and cooling system - Google Nest Help They use a lot of energy and will increase your electricity bill. Heat Pump Balance controls AUX heat. But when the winter weather drops to 40 degrees, that means your system will blow air that is about 95 degrees. When I installed my Nest thermostat it was blowing hot air instead of cold. Im having the same problem. Tell us more and well help you get there. An indicator on your thermostat should alert you when your heating has switched to auxiliary heat. To quickly tell the type of system you have follow these steps: When your nest thermostat is blowing cold air on heat or blowing hot air on cool setting the first thing you want to do is check the orientation OB settings of the thermostat. You might be surprised! The nest seems to blow warm air normally but once it switches to alternative heat source, then it starts blowing cold air. Another simple way to check whether you have a heat pump or not is to check your thermostat wiring. Make sure to shut off the heat before you call the HVAC technician. Although some auxiliary heaters are built into the heat pump, they have separate wiring and function differently. Make sure you have a heat pump system 2. 4 Reasons Why Your Auxiliary Heat is ON But No Heat. I've attached photos of my old and new wiring. Then click on the thermostat and scroll down to the heat pump. Tap Settings. Nest Sense gives you plenty of control over your heating system. Try switching between heating and cooling. See the two pins on it, that's where the plug goes to energize the valve. Ensure that your thermostat wiring is done properly for your specific heat pump. Nest Thermostat in heat mode, after 10 mins it blows cold air Here is the old thermostat wiring: Original Thermostat Wiring, This wiring was copied to the Nest: Nest Wiring. If you have wires in both the W1 and W2 connectors of your Nest thermostat, your system is a dual fuel system, and wont use Heat Pump Balance. Nest Thermostat Not Cooling (Blowing Hot Air on Cool) [Solved] However, if the issue has already happened, the only option is to call an HVAC technician. Or, maybe, the wiring to the coils is compromised. Nest Thermostat Not Cooling Even worse, it may start blowing hot air instead of cooling your room! Nest 3rd Gen - Blowing Cold Air When Set to Heat Some background: The nest has been installed for a few weeks now, but since installation the heating has worked sporadically. Start by removing the face of your thermostat and check if the OB wire is connected into the right terminal. Scan this QR code to download the app now. This does not effect our editorial in any way. 05:50 PM. The O/B terminal on your Nest thermostat is responsible for charging your changeover valve for cooling or heating. Discussion on Google Nest products, including installation and configuration. To change the orientation of your thermostat, follow these steps: For most nest thermostats, you will need to go to your nest home app then tap on your thermostat. There simply isnt enough heat in the outdoor air for your unit to absorb and carry into your home. You can change this option any time in the Nest Sense menu. Discussion on Google Nest products, including installation and configuration. Or perhaps the thermostat battery is depleted. Scroll down until you find a heat pump. Note that you can still set a lockout temperature by following the previously mentioned steps: Settings > Equipment > Heat Pump. You must have a Rheem or Ruud System. Why Is My Heating Still ON When Thermostat Is OFF. Backup heat sources must be connected to the W2, Aux, or E terminal for proper functionality.)