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Old 04-05-2020, 09:58 AM   #1
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Whining inducer


When the inducer motor runs it has a high pitch whine to it. Can I lube the motor? Or is it from the inducer blower wheel?
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Old 04-05-2020, 10:07 AM   #2
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Re: Whining inducer


Probably the motor bearings.
Post a video of the noise.
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Old 04-05-2020, 10:08 AM   #3
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Re: Whining inducer


Best off replacing inducer before it locks up fully.
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Old 04-05-2020, 10:59 AM   #4
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Re: Whining inducer


Was figuring out how to post videos. Hope this works. Here it is:
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Old 04-05-2020, 12:48 PM   #5
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Re: Whining inducer


ya it doesn't sound good.

time for a new inducer - for that one you may be able to get the wheel and motor separately at lower cost than whole assembly.
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I am not in the business of any trade I give advice on. I have non-professional hvac experience + good knowledge of theory. Attempt repairs at your own risk. Never jump out safeties - especially pressure switches - on a furnace for testing with fuel supply on; use a meter. Do not troubleshoot with live line voltage present unless there's no alternative.
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Old 04-05-2020, 06:56 PM   #6
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Re: Whining inducer


If you're mechanically inclined, take it off and see if the blower wheel is scraping on the housing or the screws that hold the motor. I've seen that a time or two. Loosening the set screw and recentering the blower wheel on the shaft ever so slightly is an easy fix.

I offer than based on my hearing of that video you made... it sounds like metal to metal scraping to me. My high frequency hearing isn't all that keen though so maybe I'm missing something.

Anyway, worth a look... those I fixed that way are still running and it has been over 10 years. I think it was due to natural wear on a thrust washer and too close of an install from the factory but warned the users that the bearing might be going out. One of those repairs was for a friend and ever time I see him now he gives me a shout out about how that bearing is still alive and doing well. LOL

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Old 04-05-2020, 07:21 PM   #7
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Re: Whining inducer


TIP: Easy way to diagnose what I mentioned is to press on the end of the motor shaft (some you can get to, some not) with a screwdriver while it running to move the shaft inward a small bit. If the sound goes away, it's fixable by adjusting.
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