From the work history I see the fan motor had been replaced twice. I went to it and found the fan motor running slowly. the instant I put my voltmeter leads on it, it fired up at full speed. There was no wiring diagram with the unit so I downloaded one from here(Thanks Samurai) and went back with it, and one of these:
Installed that, turned the unit on, and everything seemed okay, good airflow into the fresh food section, I heard the damper running until the door was open, compressor, condenser fan all humming along.
I was called back to find the same slow running fan. This time, I checked the fan's voltage at the pc board in the FF section; again the instant I put my second lead into the hole, the fan fired up full speed. I went through all the wiring between the freezer and FF side from the fan to the pc board; one wire that goes from the pc board to the damper motor looked crushed, so I cut out that piece and re spliced it.
The thermistor's resistance was 3.3k at room temperature.
1. Would a bad thermistor make the fan run slow? It's a single speed 120vac motor.
2. The tech sheet says to check the thermistor, but I don't know what values to look for.
3. When I arrive, the fan is running slow; it's running full speed when I leave, all 3 times.
Does anybody have any Ideas on where to go with this one?