I have a goodman crt60-1 that cools my upstairs and the same unit for my main level.
Yesterday, I noticed the thermostat was blank, and suspected I needed to replace the battery. Upon checking, I learned the thermostat has no battery. To verify, I swtched thermostats (main level to upstairs) and found the main level thermostat was also "dead" upstairs.
If the thermostat is blank this means there is no power being fed to it from the indoor furnace. So check I checked the breaker for the furnace, and it is ok. I even reset all the breakers. Still no power.
I made sure that both doors for the furnace were secure. They were fine.
I located and inspected the 3 amp fuse on the furnace control board assuming it had blown. However, it was fine.
I know the outdoor unit has a small brown thermostat wire running into it from the inside of the home and I have disassembled the housing to make sure the wire didn't come loose or get disconnected.
The wire was fine and I have put it all back together, yet still nothing.
Any ideas will be greatly appreciated. I am stumped.