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Old Yesterday, 05:04 AM   #1
RangerDave
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Radiator fan burned out - photo

My radiator cooling fan stopped working last month. I was told it was very unlikely to actually burn out, and my post sparked a debate about how to test the fan. I got a new fan a few weeks ago, but opened up the old one tonight to see if I could find any obvious damage - and I did. Just thought I would share with the community:

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Name:	fan.jpg
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ID:	781827

I wonder if the spider living right next to the short had anything to do with it
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Old Yesterday, 05:52 AM   #2
RayPooley
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Quote:
Originally Posted by RangerDave View Post
My radiator cooling fan stopped working last month. I was told it was very unlikely to actually burn out, and my post sparked a debate about how to test the fan. I got a new fan a few weeks ago, but opened up the old one tonight to see if I could find any obvious damage - and I did. Just thought I would share with the community:

Attachment 781827

I wonder if the spider living right next to the short had anything to do with it
Do spiders conduct electricity? There's my next project.
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Old Yesterday, 09:16 AM   #3
jeffbert
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I have seen them conduct electricity between the posts and energized wires of my electric fence that protects my wifeís bees from bears. They donít last long though.


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Old Yesterday, 10:15 AM   #4
randy72877
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I have replaced LOTS of those fans over the years but I never actually disassembled an old one. Usually the driver/controller goes bad and burns up (like yours) but I never knew that they used a brushless motor. I am surprised and impressed by this considering the part was developed over 20 years ago. I guess that is why the motor itself rarely fails. If only they built the controller better.

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Old Yesterday, 04:55 PM   #5
Sapote
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In this case, a bad driver shorted out the brushless motor's stator windings leading to burned wires. The motor would be fine if the driver was not damaged.
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