We have an allegiance 12 unit circa 2001, model 7a2024a100a3, the fan starts up and runs for about 5 minutes then shuts off, the compressor is still on and seems to build up a bit the "flush" or so it sounds, then build up again. I can turn the fan blades manually. When the fan stops we get warm air in house, when it runs it is cold.
Any help is appreciated
Best Answer
If it's NOT the capacitor, then the fan motor is kicking out on over heat via its integral thermal overload. You need a new fan motor (save the blades from the old one).
I don't bother with testing capacitors. Both fan and cap get swapped out on a 14yo unit. If it can start and run for a while, I highly doubt it's the cap, but you should replace that $5 item regardless. The bearings on the motor may be fine but that doesn't mean the windings are ok (failed windings will lead to thermal overload even though it 'works').
Most integral overload sensors reset themselves. That's why it comes and goes every five minutes.