It is on a split system Trane heat pump. I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. This reply will now display in the answers section. Community content may not be verified or up-to-date. This will remove the reply from the Answers section. Sign in to the Nest app in your web browser with your Google Account or non-migrated Nest Account. Assistance with NEST/emergency heat/AUX lockout Not sure if anyone can assist but I have a small question. Compressor Damage. Before you call a professional, take a few minutes and follow a … How to override outside temperature lockout for (cooling) compressor? Our automated system analyzes the replies to choose the one that's most likely to answer the question. Go to the Legal Help page to request content changes for legal reasons. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. Nothing could get the fan to turn in other than heat mode. Why does my nest say aux heat? Post contains harassment, hate speech, impersonation, nudity; malicious, illegal, sexually explicit or commercial content. Recently replaced my Honeywell stats (split system) with Nest stats (upstairs/downstairs). I’ve just found 10,000 ways that won’t work.” - Thomas Edison. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Details. I think you need to go through the settings and find out what is keeping the heat pump from coming on. 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The user interface provided by the Nest thermostat differs from the Nest website and iOS/Android apps. The Thermostat belongs to me. Account & Lists Sign in Account & Lists Returns & Orders. Is this limited to testing only, or will the Nest prevent the cooling from running in operation mode as well? If you have a heat pump system, place it into the O/B terminal. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. The aux heat wire is connected to W2 Aux. I stillhave the old stats so I could just re-install them. It shuts off the compressor and uses only AUX heat when the outside temp is below this number. Nest 3rd gen model will turn ON the aux heat system only when it is necessary (only when the outside temperature falls below the aux heat lockout temperature). Show Printable Version; 02-02-2019, 04:25 PM #41. pecmsg. You'll receive email notifications for new posts at. 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