topic Aux Heat not working on a Electric Heat Pump in Nest Thermostats

Aux Heat not working on a Electric Heat Pump

gjhathaw — Tue, 14 Dec 2021 21:28:18 GMT

Issue

I am unable to get the aux heat to engage in test mode nor in normal operational mode (raised the the thermostat setting 10+ degrees over the room temp).

Background

I have Nest 3 learning thermostat installed and it was working correctly with my Goodman electric heat pump/ac unit. Yesterday I replaced the Goodman system with a Trane electric heat pump/ac unit.

Debugged

I swapped out the NEST with my old Honeywell thermostat and the it operates properly (cool, heat and Aux heat). I reinstalled the Nest . Wired as it the same as my original Goodman unit. (see pic). I have done a factory reset and walked through all of the setup steps (including heat pump balancing). No luck getting the aux heat to run (normal heat and cool work fine). Any ideas?

Re: Aux Heat not working on a Electric Heat Pump

gjhathaw — Wed, 15 Dec 2021 16:09:27 GMT

Issue has been resolved. Reseated the wires and the aux heat now works.

Re: Aux Heat not working on a Electric Heat Pump

Jeff — Thu, 14 Jul 2022 17:40:31 GMT

Hi, all.
As we got our resolution here, I'm going to mark this one as resolved. Thanks to all who helped and contributed. If anyone has any other needs, please feel free to open up a new thread.
Thanks,
- Jeff