Whats the indoor temperature? Move the W wire to the W2 or Aux terminal. The exact value varies from one heat pump to the next. Because AUXheat is so expensive, running the heat pump longer can be cheaper than using AUX 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. I installed a Nest thermostat and everything was working fine until I had to put the heat on in the winter. Caulk and weatherstrip doors and windows that may leak air. Then youll need to go down to your furnaces control board. Nest Thermostat Blowing Hot Air on Cool After Installation If you are dealing with a nest thermostat that is blowing cold air on heat mode, then this is a perfect guide for you. If the problem doesnt go away after trying out these tips, perhaps call in local HVAC experts for help. Nest Says It's Heating But It's Not? (Possible Causes & Fixes) Were you able to try Patrick's suggestion above? temperature. If the temperature outside is 40 degrees or above, but your home wont stay warm if not in emergency heat mode, call your local HVAC expert. All Rights Reserved. when the prompts ask me if I had a heat pump initially I had indicated yes but this was incorrect. Here are some wiring diagrams for heat pumps that could help you. The same applies to gas furnaces. Generally, when a Nest thermostat is blowing cold on heat mode, this is something to do with orientation settings, a stuck reversing valve or loose wires in your thermostat wiring. However, to ensure that your thermostat has started working, you must test the cooling and heating again. Your Nest thermostat is not compatible with your cooling system. Discussion on Google Nest products, including installation and configuration. Click Continue, then select heat pump. Most people prefer to use the Nest app to adjust the settings because it doesnt require getting off the couch. If the auxiliary heat source is engaged, but theres no heat coming from it, then theres a problem. YourNest thermostat willadjust your lockout temperature based on how your heatpump is working. Nest thermostat Heat Pump Balance settings are for systems that have a heat pump and auxiliary (AUX) heat. Not sure if your heater is working properly? AUX heat can turn on when it's too cold outside, or your heat pump needs to defrost. If you dont have a wire in the W2/AUX connector, you dont have AUX heat. 90% of all HP systems use O to energize in cooling not heating. Changing orientations between heating and cooling depend on your heat pump model. In this article, well discuss the basics of using a Nest thermostat and what to expect. Lets find out. Its not changing from cold to hot. Even though our original set up didnt have a C - wire, we had extra wires that my husband was able to use (thankfully) so we avoided a c wire adapter and also an expensive electrician trip. Here is the old thermostat wiring: Original Thermostat Wiring, This wiring was copied to the Nest: Nest Wiring. Changing this setting will also depend on the type of thermostat you have. Nest Thermostat Not Cooling Even worse, it may start blowing hot air instead of cooling your room! Well, I don't got much for you then. I'm looking for a picture to send you. It happens sometimes. Nest 3rd Gen - Blowing Cold Air When Set to Heat : r/Nest - Reddit Ensure also that the end of the wire connecting to the O/B terminal is stripped enough to have proper contact with the terminal. Make sure your heat pump is receiving power and check that your thermostat is set to heat. I went into the home app and went through the initial setup again.3. This will help avoid tripping your thermostats failsafe feature and starting your auxiliary heat cycle. Using Auxiliary Heat with a Nest Learning Thermostat - MROB If O is highlighted, select B and then try to call for heat. Nest Thermostat Not Cooling (Blowing Hot Air on Cool) [Solved] Your air filter may also need to be cleaned or changed if it is clogged and unable to efficiently let air through. If your Nest has alerted you to low battery power, this might be why you're running out of heat. Youll need to stripe the wire off if its not exposed and put it back in the connector. Now try to feel the air that is coming out of your vents. Start by removing the face of your thermostat and check if the OB wire is connected into the right terminal. You can do this by first putting your thermostat on heat mode. Then raise the temperature on your thermostat above the current room temperature reading. Sometimes systems may need the C-wire to be installed to be compatible. Lets find out. 11:27 AM Keep in mind that its not uncommon for the AUX hit to automatically switch on even when the pump is providing enough heat. Why is My Nest Thermostat Blowing Hot air on cool mode? Though not often, you may occasionally run into situations where you think the aux heat function is ON. If I try to move the black cable to W1 then it thinks that its gas and not electric. Check the label on your outside unit. A Nest thermostat will blow hot air on cool mode if you dont have a heat pump. That being said when you provision the Nest you have to change it to energize in heating, or switch from O to B. The heat pump is your homes primary heating source, but when the weather gets too cold, a secondary heating source is needed. 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. I need assistance with my thermostat. Why Is My Heating Still ON When Thermostat Is OFF. The best temperature to set your thermostat to in the winter is 68 degrees while youre at home. Your system may be frozen or need repair. Since you dont have AUX heat,Heat Pump Balance won't appear as an option. If the unit connects to an auxiliary electric heater, it may also rely on the homes ductwork. Its not advisable to attempt DIY on auxiliary heat systems, especially gas heaters. : The first thing you should do here is to check your thermostat. Remember that you can change the aux heat setting so that auxiliary heating only when a set of conditions are met and not just one condition or the other. If it isn't, you can useEarly-On, but your thermostat won't take specific measures to avoid expensive AUX heating. Im having the same problem. This can help prevent false alarms in the future. If its higher than 40F, you dont need heating, and the aux ON display was probably a false alarm. If your heating system supports an AUX heat function then you have to make the appropriate configuration based on your personal needs and preferences. If you touch the orange and yellow wire and nothing happens, your changeover valve is faulty, or disconnected. Scroll down until you find a heat pump. Because your heat pump works as a heater and an air conditioner, it might work in the heater mode. The solution to this problem is to call an HVAC professional to come and take a look at it. You have probably wired it according to the conventional row. : Diagnose the thermostat. For a 1st stage heat pump, these are the terminals that are supposed to be connected. When youre away, we recommend lowering your thermostat by seven to 10 degrees. 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).
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