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Old 09-09-2010, 10:41 PM   #1
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Blower motor help


Hey everyone,

I am pretty handy, but have never worked on a furnace so I am seeking assistance and knowledge.

I have a pretty old furnace and I am having difficulty with the blower motor. The motor will not turn on. It makes a humming noise and heats up when it is turned on. So by this it tells me the unit is getting power but is defective. Is that right?

Secondly, if I am going to replace it, where can I go to replace just the motor. It is a GE model # 3J522GXG 115v, 5.2a, 1/4HP, 1725 RPM. But I believe it was discontinued. Also to note this motor works on a belt system and is seperated from the main blower unlike most others I have seen.

Any suggestions or thoughts are greatly appreciated.

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Old 09-10-2010, 03:55 AM   #2
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Blower motor help


Thats a standard belt drive blower motor.

Any HVAC supply house will have it. So will Graingers.

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Old 09-10-2010, 05:48 AM   #3
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Blower motor help


Thanks very much. From the symptoms I described does it sound like its the blower motor as being the culprit here?
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Old 09-10-2010, 06:08 AM   #4
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Blower motor help


Could be the motor or could be the bearings. Take the belt off and check both.
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Old 09-10-2010, 07:43 AM   #5
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Blower motor help


With the hum, do take the belt off and spin the blower housing with you hand to just check for a bearing sieze. But think about the start capicitor before replacing motor. Another tip WW Grainger will not sell retail to a walk in customer.
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Old 09-10-2010, 04:18 PM   #6
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Blower motor help


Residential belt drive motors aren't PSC motors so they don't have a capacitor.

But good thinking in general though. I hate making 2 trips to a supply house.
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Old 09-16-2010, 11:41 AM   #7
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Blower motor help


I have been able to find someone with a motor with almost exact specifications, but instead of it being 1/4 hp it is 1/3 hp. Are there any issues with me upgrading to that? Any concerns with it?
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Old 09-16-2010, 12:14 PM   #8
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Blower motor help


You may need to put an amp meter on the motor and check / adjust the amp draw with the pulley other than that, I see no issues

Last edited by kenmac; 09-16-2010 at 12:37 PM.
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Old 09-16-2010, 02:04 PM   #9
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Blower motor help


I have two motors available to me now.
115 Volt, 5.6 Amp, 1725 RPM, 1/3 HorsePower for $50 (NEW)
115 Volt, 5.4 Amp, 1725 RPM, 1/4 HorsePower for $25 (USED)

My only concerns I had was my previous motor was 1/4HP and 5.2 amps. Thank you Kenmac for the HP question. I assume a 0.2 or a 0.4 amp difference is not a big deal aswell.
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Old 09-16-2010, 04:26 PM   #10
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Blower motor help


Get the 1/4.

The HP difference won't hurt on a belt drive motor, since its not a PSC motor.

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