I was on call this weekend, and must have replaced five blower motors. Most of them where pretty obvious, burned up windings or bad bearings. One of the motors through me for a loop. I bent down to look at the motor as it tried to start, and it just sat there and hummed. I spun the wheel with my hand, and it kicked right on. Sounds like a bad capacitor right?---nope, 7.5 microF right on the nose. I checked incoming voltage, tried an new capacitor anyway, checked continuity/resistance in all of the windings--no dice. As a last resort, I just replaced the blower motor and everything ran fine.
Has anyone else seen this before, did I make a mistake?