Mechanics

WHAT AUSES THE A/C MAKE A LOUD HUMMING SOUND ONLY ON HIGH SPEED

2002 Pontiac Firebird • 77,000 miles

A/c set at coldest has 4 speeds no noise but just on 4th speed
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Billmill5050
May 20, 2012.



If the loud humming noise is coming from the blower fan motor then sounds like you have a bad bearing in the motor etc.


Saturntech9
May 20, 2012.
It only does it on high not on low or med


Tiny
Billmill5050
May 20, 2012.
Have you dropped the motor and checked the squriel cage for leaves debris etc?
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Saturntech9
May 20, 2012.
No where is it under dash


Tiny
Billmill5050
May 20, 2012.
There you go.


Saturntech9
May 20, 2012.
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


Tiny
Billmill5050
Jul 13, 2012.
Another pic


Tiny
Billmill5050
Jul 13, 2012.
Thats a bad pic can you take a actual pic of it and post it or email it to me?


Saturntech9
Jul 13, 2012.
Ok ill post if not where do iu e-mail u?


Tiny
Billmill5050
Jul 13, 2012.
3 more


Tiny
Billmill5050
Jul 13, 2012.
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