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Old 11-25-2013, 06:39 PM   #1
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Question Heat pump blower sounds like bearing?

Hey folks, got to the low 30's here in Hotlanta, with my electric heat on, blower started screaming, change over to gas heat. Works fine when temp. is warmer, when close to 29*, blower makes a lot of noise. Is there something going on at this temperature? Book say's it will not work lower than 36*. Is heat pump freezing up or my bearings going bad?
thanks--------jackkflapp
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Old 11-25-2013, 06:46 PM   #2
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Might as well turn on the lp furnace or use small ceramic heaters as most rv heatpumps won't/don't work below 30-40 degrees. We have had ours on at those temps and they do make funny noises. We shut it off and turned on out ceramic heater. Problem solved.
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Old 11-25-2013, 07:00 PM   #3
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What heat pump unit brand, is it basement or roof model? The basement models have bushings instead of sealed bearings on the fan shaft, and require occasional oiling.
Run a search here for posts by Dunner. He has some excellent tutorials for a basement AC/heat pump unit maintenance.
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Old 11-26-2013, 10:30 AM   #4
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Originally Posted by Ray,IN View Post
What heat pump unit brand, is it basement or roof model? The basement models have bushings instead of sealed bearings on the fan shaft, and require occasional oiling.
Run a search here for posts by Dunner. He has some excellent tutorials for a basement AC/heat pump unit maintenance.
No, that'd be "Duner" and that's me. I see that you have a 39 ft Adventurer, so it must be 2003 or 2004 like my Chieftain with a basement heat pump/ac unit.

I suspect you have worn out the brass bushing on the shaft of the outdoor blower. Also the metal squirrel cage of the outdoor blower get very noisy and as they loosen up and develop stress cracks like mine did.

Quite a few iRV2 member have fixed their own using a procedure I wrote with detailed photos.

You can download it here.
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Old 11-26-2013, 04:52 PM   #5
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Originally Posted by jackkflapp View Post
Hey folks, got to the low 30's here in Hotlanta, with my electric heat on, blower started screaming, change over to gas heat. Works fine when temp. is warmer, when close to 29*, blower makes a lot of noise. Is there something going on at this temperature? Book say's it will not work lower than 36*. Is heat pump freezing up or my bearings going bad?
thanks--------jackkflapp
What year, model? Ours has roof heat pumps and they will make loud noises as tempt get to 32-36 degrees.
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Old 11-26-2013, 06:54 PM   #6
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Sorry Duner, my bad.
On a side note, I talked to the senior RV technician today(20 yrs svc) at Camping World/ Winnebago dealer/factory authorized service center. He said those fan shaft bushings seldom fail. The motor bearing (2 types) the one without a yellow plug for oiling is usually the one to fail. When those bearings begin to fail you can feel a vibration through the MH floor. Don't know it that's true, just what he said.
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