Question about Heating & Cooling
The fan on the furnace is not spinning, when the furnace comes on it hums. The pilot lights and flames come up but it's not heating the house like it should.
Check the fan capacitor first. its a little silver flat battery looking thing near the motor. be sure to kill power. test mf value stamped on the side with a meter, or take to a motor shop and test. if its good the motor is bad. . pull whole blower assembly and change the motor or take to motor shop and let them change. label all wires and where they go and the color. it will be tough if you don't know motors and all but generally white is to white and is common or neutral. black is high speed for ac . red is low speed for heat. brown and brown with stripe go to capacitor. blue and yellow are med and med hi speeds and taped off or put on vacant terminals. be sure to clean wheel when you have it out. good luck. you can't make to many notes , mark stuff with a sharpie pen as you dissassemble. note rotation of wheel, location of screws, clearances of wheel on each side check rotation of wheel on completion, cups into the wind. <------ )
Posted on Nov 21, 2008
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Posted on Jan 02, 2017
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