I have 2 Amana Air Command Hi Efficiency 90 gas furnaces. They are both about 12 years old.
One has had service three times in the last month and a half and the symptom is always the same….blowing cold air.
First they replaced the thermostat? Next they replaced the igniter with an upgraded version that is not as fragile. Now they think it is either the control board or the blower. I was told to unplug the unit and plug back in to rectify the problem. This works initially but does not last long. This unit is in a bed & breakfast and a real problem for paying guests.
I am getting fed up with the expense of having service on this unit and am interested in fixing it myself, can someone please give me some insight?