A/C humming
I have a Duo-Therm (Domestic) rooftop airconditioner. Tonight it has started to make a deep humming sound. It is still blowing cold air just fine, but the weird thing is that when I try to shut off th...
Forum Discussion
barnaclebill wrote:
OK, now I am confused, although I am easily confused :) is it the board on the roof unit or the thermostat board that is bad?
YOUR AC board on the upper AC unit is BAD. Doug
