On Thursday, August 18, 2016 at 1:14:05 PM UTC-4, Mike wrote:
I think what you're saying is the blower goes on and off when using
it in the fan on all the time mode or with the blower set to auto,
where it only runs with heat or AC. So, it sounds like either a bad
blower motor, bad control board, or maybe a bad capacitor. I'd
start by finding out if there is AC voltage to the motor when it's
cutting out. That assumes it's an AC motor. If it's one of the
fancy ECM variable speed motors, well, I guess that's more difficult
to diagnose. Any flashing LEDs on a control board?
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