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What auses the A/C make a loud humming sound only on high speed

Tiny
BILLMILL5050
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  • 2002 PONTIAC FIREBIRD
  • 77,000 MILES
A/c set at coldest has 4 speeds no noise but just on 4th speed
Sunday, May 20th, 2012 AT 12:27 AM

14 Replies

Tiny
SATURNTECH9
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If the loud humming noise is coming from the blower fan motor then sounds like you have a bad bearing in the motor etc.
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Sunday, May 20th, 2012 AT 12:44 AM
Tiny
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It only does it on high not on low or med
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Sunday, May 20th, 2012 AT 7:07 AM
Tiny
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Have you dropped the motor and checked the squriel cage for leaves debris etc?
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Sunday, May 20th, 2012 AT 7:10 AM
Tiny
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No where is it under dash
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Sunday, May 20th, 2012 AT 9:15 PM
Tiny
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There you go.
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Sunday, May 20th, 2012 AT 10:14 PM
Tiny
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I took off the glove box to get to the motor but I dont know what it is but its in front of the heater core when I masshed it the humming sound quits any idea what it is I posted pic what it looks like
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Friday, July 13th, 2012 AT 8:18 PM
Tiny
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Another pic
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Friday, July 13th, 2012 AT 8:24 PM
Tiny
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Thats a bad pic can you take a actual pic of it and post it or email it to me?
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Friday, July 13th, 2012 AT 8:28 PM
Tiny
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Ok ill post if not where do iu e-mail u?
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Friday, July 13th, 2012 AT 8:58 PM
Tiny
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3 more
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Friday, July 13th, 2012 AT 10:25 PM
Tiny
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1 more
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Friday, July 13th, 2012 AT 10:30 PM
Tiny
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Where did you get your diagrams at?
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Friday, July 13th, 2012 AT 10:33 PM
Tiny
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I ran ac it open & closes a door when u go from ac to max ac
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Saturday, July 14th, 2012 AT 12:13 AM
Tiny
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Thats your recirculation door actuator.
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Saturday, July 14th, 2012 AT 12:25 AM

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