Trane xl 80 blower motor

Old 12-15-13, 10:50 AM
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Trane xl 80 blower motor

My blower motor was making a humming sound so after looking problem up i was thinking it could be the capacitor so i took the furnace apart unplugged the capacitor and checked it with a digital meter and the ohm came up then dropped so i discharged it with a screwdriver and checked again and same so i was hoping it was good enough so i plugged it back in and but it back in its bracket but before butting furnace back together i turned it on to see if it would come on and it did , the blower was blowing good but still had a slight whining to it when spinning so i turned it off and let it come to a stop and tried it again and same thing spinning and whining so i but it together and now it don't spin it just hummed like it is trying to turn just not enough power to get started
Old 12-15-13, 11:14 AM
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The ohm test is like checking that your car battery has dc voltage but not what the voltage measures.

You need a meter that can measure capacitance or just replace the cap.

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