During the winter, I noticed a loud hum coming from my furnace at all times.
The other day, I tried to turn on the AC and got no response.
Checked the furnace room, and found the noise is gone. No response at all from the thermostat, either heat or AC. Checked power, and there is power at the breaker.
Should I start by replacing the 24V transformer?
Randy
The other day, I tried to turn on the AC and got no response.
Checked the furnace room, and found the noise is gone. No response at all from the thermostat, either heat or AC. Checked power, and there is power at the breaker.
Should I start by replacing the 24V transformer?
Randy