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Furnace blower motor problem

Asked Jan 1, 2005, 10:27 AM — 2 Answers
I need some help with a non-working furnace in Colorado.

The furnace is an 1988

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labman's Avatar
labman Posts: 10,673, Reputation: 3051
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#2

Jan 1, 2005, 10:56 AM
You should be able to easily spin the squirrel cage by hand. If its bearing are bad, and dragging, the motor is not going to be able to turn it. You must get some lube in the bearings for the fan. Chances are they are sealed for life, without any easy way to lube. You may have to slide the shaft out of sleeve bearings and apply grease by hand. With sealed ball bearings, drill a hole in the seal, or remove it completely and add grease or oil.

If the motor now turns the fan OK, you have bought yourself some time. You may have to keep adding grease or oil to nurse a bad bearing along. You should be able to judge whether the fan ''sounds right'' like it did before.

With a new motor, you might consider new bearings for the fan if they are the problem. If the heat exchanger is sound, and the furnace isn't an inefficient older design, you might go ahead and keep it having invested in a new blower motor.

Code may forbid a fuurnace in the crawl space now. A new furnace may have to goelsewhere. You are allowed to repair an old one.
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wizrd1's Avatar
wizrd1 Posts: 1, Reputation: 1
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#3

Jun 10, 2007, 04:47 PM
Hi
My furnace blower motor runs for 2-3 minutes, Then quits, help

Pat
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