Today I had a blower motor that wouldn't run.
In the past, I've pretty much checked for 230V
(or 115V, but this was a package), and tested
the capacitance on the run cap, and then
called it bad. Today, I did all that.
But because it has been slow and I've
been working at refining my HVAC tech approach,
trying not to be so dumb about things,
I went ahead and checked resistance between
the three motor leads and to ground.
Resistances were basically sound--something
like 23, 43, and 66 ohms. Open to ground on
But when I applied power, the motor moaned
and was locked--I couldn't spin the blower
wheel with my screwdriver in either direction.
With power not applied, the motor would turn but
with some--but not a lot of--resistance.
I'm sure the bearings aren't the best, but
I would think the thing would spin a bit or
at least until it warmed up. No. Are motors
REALLY weak starting from a dead stop?
Is that the problem here?
This is disturbing me.
Thank you for any enlightenment.