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AC fan not working sometimes

Tiny
JERW12345
  • MEMBER
  • 1993 BUICK REGAL
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 134,218 MILES
Having problems with my air conditioner fan. It works occasionally. I just want to know what the problem might be and how I might fix it? Thanks.
Saturday, March 19th, 2016 AT 9:02 PM

4 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,513 POSTS
Hey Jerw12345,

It sounds like the blower motor itself has gone bad, here is an example on how to replace and test it.

https://www.2carpros.com/articles/blower-motor-testing

When it is not working if you hit a bump does it start up again? This is a classic blower motor failure symptom.

Please let us know how it goes.
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Saturday, March 19th, 2016 AT 9:40 PM
Tiny
JDL
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Are you talking about the blower motor? If so, did you check good voltage and ground at the blower motor connector when problem is ongoing? If good voltage and ground with no blower action, suspect the blower motor. Sometimes those small motor brushes will wear down, if that happens, a vibration or bump may reset the brushes, momentarily, and the motor runs for a bit, then same old problem.
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Saturday, March 19th, 2016 AT 9:47 PM
Tiny
JDL
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  • 16,098 POSTS
Hi Ken, didn't see you, have a good day.
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Saturday, March 19th, 2016 AT 9:48 PM
Tiny
KEN L
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No problem the more input the merrier :-)
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Saturday, March 19th, 2016 AT 10:07 PM

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