furnace blower electrical motor


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Old 01-04-12, 08:07 AM
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furnace blower electrical motor

Greetings! I have a Armstrong Ultra sx 90 furnace and the blower electric motor started few weeks ago to make a noise when running.
I suspect that might be the bearings.
Is it anything that I can do by myself to fix this?
The motor is in a cage (might be dust proof) with a lot of wires in/out and removing it by myself I don't think is an option.
Can these bearings be greased or lubricated somehow without removing the motor or do I have to call a specialist?
You know, it is after the holidays and I don't have to much money left...
 
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Old 01-04-12, 09:39 AM
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Very few blower motors use grease. Most have two oil ports that need to be oiled every few years. Some are permanently lubricated and have no oil ports.


If it's a motor that needs to be oiled, usually one of the oil ports are visible at the end of the motor.

If that's what you have, sounds like you'd better have a repairman do the job for you. Oiling the one visible oil port is a waste of time, and to do both requires completely disassembling the fan assembly to get at the other oil port ---typically that takes 45-60 minutes or so.

And don't put it off. A motor that has started to be noisy because of neglected oiling will be a seized up motor that needs to be replaced in a few days or a few weeks. Get it oiled now and save yourself the expense of a new motor.
 
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Old 01-04-12, 09:45 AM
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thank you,
I don't remember to see a lubrication port, but I'll look again in the afternoon.
To disassemble the motor I don't know if it's a good option now, in the middle of the winter, I'm not an electrician and I hope I can go another few months with this one...
 
 

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