I have a Weathertron Termostat which controls my Heat Pump and Furnace -
Model #3AAT80B1A1. Both the lights Auxiliary, and Emergency are burnt out.
I would like to replace the Termostat. Where can I get a replacement or can you substitute a Honeywell with the same wiring as I will be doing it myself.
Thank you and look forward to a helpful reply.
Yours truly.
Zepton

Any heatpump thermostat should work fine. Turn the power off first and follow the instructions with the thermostat you buy. You have a dual fuel system, if you have a heatpump with a gas furnace back up. If you have a simple heat pump thermostat you can use about any brand to change it out with( They use a out side thermostat to switch from heatpump to gas) If you use a dual fuel thermostat they use a outside thermistor to switch from heatpump to gas and you would need to use a like thermostat.