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

2002 Pontiac Firebird

Tiny

billmill5050

May, 20, 2012 AT 12:27 AM

A/c set at coldest has 4 speeds no noise but just on 4th speed

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14 Answers

Tiny

saturntech9

May, 20, 2012 AT 12:44 AM

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

Tiny

billmill5050

May, 20, 2012 AT 7:07 AM

It only does it on high not on low or med

Tiny

saturntech9

May, 20, 2012 AT 7:10 AM

Have you dropped the motor and checked the squriel cage for leaves debris etc?

Tiny

billmill5050

May, 20, 2012 AT 9:15 PM

No where is it under dash

Tiny

saturntech9

May, 20, 2012 AT 10:14 PM

There you go.

Tiny

billmill5050

July, 13, 2012 AT 8:18 PM

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

July, 13, 2012 AT 8:24 PM

Another pic

Tiny

saturntech9

July, 13, 2012 AT 8:28 PM

Thats a bad pic can you take a actual pic of it and post it or email it to me?

Tiny

billmill5050

July, 13, 2012 AT 8:58 PM

Ok ill post if not where do iu e-mail u?

Tiny

billmill5050

July, 13, 2012 AT 10:25 PM

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