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Why replacing only fan blades? #4945348
12/06/18 06:53 PM
12/06/18 06:53 PM
Joined: Aug 2002
Posts: 14,729
Silicon Valley
PandaBear Offline OP
PandaBear  Offline OP

Joined: Aug 2002
Posts: 14,729
Silicon Valley
While troubleshooting some fridge noises I noticed many YouTube videos on replacing only the fan blades. Why would the blades be worn instead of the motor assemblies? Wouldn't they be on the shaft and if they hit something it would have been the shaft being out of balance, and the whole motor assembly needs replacement?


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Re: Why replacing only fan blades? [Re: PandaBear] #4945357
12/06/18 07:05 PM
12/06/18 07:05 PM
Joined: Oct 2004
Posts: 8,614
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline

Joined: Oct 2004
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Cincinnati, OH, USA
Some of them are plastic, they can crack & break off. The whole thing is cheap enough I would replace it all while I'm in there. Sometimes a defrost problem can damage them too.


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Re: Why replacing only fan blades? [Re: PandaBear] #4945406
12/06/18 08:15 PM
12/06/18 08:15 PM
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New Jersey
JHZR2 Offline
JHZR2  Offline

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New Jersey
Some refrigerators build up ice jams in the coil area where the fans operate. Often the noise is fan blades hitting the ice. If the fan blades wear down... then they need to be replaced. If the fan still spins, while it seems penny wise, pound foolish to keep the motor, perhaps if it's young and easy to get to, it saves cost.

Re: Why replacing only fan blades? [Re: PandaBear] #4945465
12/06/18 09:16 PM
12/06/18 09:16 PM
Joined: Dec 2017
Posts: 1,546
US
JLTD Online shocked
JLTD  Online Shocked

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Balance and efficiency. I had a furnace that had (IIRC) a 14-blade fan; one of the blades was broken off and it was imbalanced enough to cause the whole unit to switch off. Once the fan (and only the fan!) was replaced, it had no further problems. Efficiency suffers when the fan blades erode over time.


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Re: Why replacing only fan blades? [Re: PandaBear] #4948533
12/10/18 07:36 PM
12/10/18 07:36 PM
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Silicon Valley
PandaBear Offline OP
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Interesting. Thanks for the answers.


"You keep asking questions PandaBear and you'll end up a vegetarian like my wife" - Camu Mahubah
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