Question about Heating & Cooling
Fan spins freely when off, but when it tries to start there is resistance, i tried to give it a push to start, but it wouldn't
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Posted on Jan 02, 2017
SOURCE: Furnace stopped blowing cold.
Replace motor fan and capacitor, it is a very simple task. Turn breaker OFF. Then all you have to do is remove about four screws from the top grill, about four more that fasten the motor fan assembly, unplugg electrical connectors and label them and install the new one and switch fan blades.
No special knowledge is required to perform this job. Cost: about $140 +-.
On the other hand, you call a HVAC technician, they supply the motor and capacitor, otherwise they won't give you warranty. Cost $300+. Look on the Yellow Pages for one in your neighborhood.
Good Luck!! Rate this post!!
Posted on Aug 13, 2010
SOURCE: Air Handler Blower Unit Humming
More then likely it's the transformer. It may be getting weak. I've seen them hum/vibrate almost new and last for years. It's more an annoyance than anything.
Posted on Jan 18, 2009
With power off, locate fan motor capacitor (generally silver in colour).
Rating on capacitor will be in microfarads at specified voltage ( 5mf @
370 volts). Be careful to discharge before handling and return defective
cap. to source of replacement. They can confirm whether or not truely
defective. Replace and secure. Restore power and check operation.
Purpose of run capacitor is to provide starting torque that you are
presently providing by hand spinning. Hope this helps.
Posted on Aug 05, 2009
Assuming you are spinning it when the motor is humming, if the motor runs after spinning it it could be the run capacitor (replace) or open/broken start winding in motor(need new motor). Humming should indicate the motor is getting proper voltage. If motor does not try to run by spinning then open run winding in motor (replace motor).
Posted on Aug 30, 2009
Here is a tip about trouble shooting your air conditioner...
Air Conditioner Trouble -Review the Possibilities
Posted on Jun 03, 2010
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