Question about Heating & Cooling
Wont start up just keeps humming
Is the flame igniting and then cutting off? on a gas furnace, the induction fan motor(draft motor) should start first (if the furnace is so equipped), then the flame, then the blower. if you have an induction motor (flue gas exhaust mmotor) this may be your problem (the induction motor isn't starting), if your unit doesn't have one, have you checked to see that you have gas? finally, the capacitor on the blower motor may be causing the motor not to start.
Posted on Jan 07, 2013
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Posted on Jan 02, 2017
Check fuses. one may be blown, and the other one not, Therefore you are getting only 110V to a 220v circuit.
Posted on Dec 03, 2008
If you are talking about the fan on the outdoor unit, let's try some things.
Kill power to the outdoor unit. Use breaker or disconnect. Now see if the fan will spin with no power going to the unit. If not, bad bearings. Fan D.O.A. If it does spin, good.
Now restore power and turn unit on. If fan runs now, it has a defective or damaged winding. Needs replacing. If it does not start running, most likely the capacitor is D.O.A. or the fan is "Electrically" locked up. Again, fan D.O.A.
If you do replace the fan motor, be sure to always replace the capacitor. It's usually only a few buck more.
Also, be extremely careful when trying to spin that fan. It may take off and take a finger with it. NEVER try to spin the fan with power going to it.
This is no joke, it's dangerous if you don't know what your doing.
It may well be worth having a tech check things out for you.
In any case, good luck and again, be extra careful. Never do this type of work alone, in case something happens unexpectedly.
And as a side note, you may find it next to impossible to find anyone to sell you the motor. Most all HVAC parts houses are wholesale only and will not sell to the general public just to HVAC companys. That's because they are trained to do this stuff with out injury.
Think it over and good luck.
Posted on Mar 20, 2009
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