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profft
 
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Default Blower on furnace hums and doesn't start

Beat it bozo, so skulk back to your regular NG bonehead

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...
On 23 Nov 2003 09:33:42 -0800, (Mark) wrote:

I am having problems with one of my two furnaces. When the thermostat
kicks in, the furnace will light, but the fan won't kick in. Then the
furnace shuts down. If I turn off the heat (i.e. not on heat or
cool), and turn the fan to "on", it just hums (the other furnace works
fine and the fan will run). There is a solenoid that clicks, then the
humming. The fan itself turns effortlessly.

Do you think this could be a problem with the capacitor, solenoid or
transformer?

Also, I have been having another problem (probably unrelated?) once a
year every winter when I first start the furnace. The fan doesn't
want to kick in but I didn't notice any humming - this appeared to
have something to do with that timer-like dial (is it a temperature
limit switch?). Two taps with the end of a screwdriver and I'm
usually OK for the year.

Any ideas on either problem? Thanks.


I'd replace the capacitor and see if that fixes it. They are cheap
enough to take the gamble. If that dont fix it, the fan motor is
probably shot. Take out the whole blower and take it to a motor
repair shop and have the motor tested and repaired or replaced.
Blower removal should not be that difficult. Probably 4 bolts, and
the wires. Of course shut off the power @ the breaker when you remove
the wires.