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Old 03-04-2013, 07:17 PM   #1
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furnace draft motor help


Help my furnace draft motor locks up and tries to start but doesnt turn but if I press on one of the two tlrings around the motors drive shaft in it will rotate. Idk if this is like a contactor relay or if its a bad start capacitor or the motor itself is bad. When locking up it hums loud and when I can get started is really loud some sound appears to be from motor drive shaft. Or are there any other parts it could be I have pics also its a janitrol furnace. Have great electronics knowledge but only vaguely familar with furnaces please help

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Old 03-04-2013, 07:37 PM   #2
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furnace draft motor help


Sure sounds like a bad bearing or lack of lub.

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Old 03-04-2013, 08:46 PM   #3
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furnace draft motor help


Can it spin freely on it's own when not powered?
Does it have a capacitor and is it OK?
Do you know if the board is giving it a full 120V?
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Old 03-04-2013, 09:44 PM   #4
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furnace draft motor help


If you have to replace, try to match here:
http://www.fasco.com/documents/pgs051-059.pdf

Then try to get price using the Fasco Model #

http://www.hvacpartsoutlet.com/searc...se&category=27

http://www.electricmotorwarehouse.com/

http://www.cshincorporated.com/
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Old 03-05-2013, 03:56 AM   #5
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furnace draft motor help


Yes its getting voltage and spins freely when not powered only when on it locks but I press on the area on outside of shaft and it will go I have to hold it in untill up to speed btelw takes almost 20-30 seconds to get to speed. I dont see a capacitor for this motor
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Old 03-05-2013, 06:14 AM   #6
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furnace draft motor help


Time for a new ID motor
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Old 03-05-2013, 06:22 AM   #7
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furnace draft motor help


Before you spend money on a new inducer check the heat exchanger. Take the blower out then crawl up in the blower compartment and look up. The heat exchanger is held together with a bunch of rings which are well known for breaking. If any are cracked or you see rings sitting on top of the blower assembly when removing it then you'll need a heat exchanger and inducer motor which is going to cost as much as a new furnace,or real close.

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