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

Tiny
BILLMILL5050
  • MEMBER
  • 2002 PONTIAC FIREBIRD
  • 77,000 MILES
A/c set at coldest has 4 speeds no noise but just on 4th speed
Do you
have the same problem?
Yes
No
Sunday, May 20th, 2012 AT 12:27 AM

14 Replies

Tiny
SATURNTECH9
  • EXPERT
If the loud humming noise is coming from the blower fan motor then sounds like you have a bad bearing in the motor etc.
Was this
answer
helpful?
Yes
No
Sunday, May 20th, 2012 AT 12:44 AM
Tiny
BILLMILL5050
  • MEMBER
It only does it on high not on low or med
Was this
answer
helpful?
Yes
No
Sunday, May 20th, 2012 AT 7:07 AM
Tiny
SATURNTECH9
  • EXPERT
Have you dropped the motor and checked the squriel cage for leaves debris etc?
Was this
answer
helpful?
Yes
No
Sunday, May 20th, 2012 AT 7:10 AM
Tiny
BILLMILL5050
  • MEMBER
No where is it under dash
Was this
answer
helpful?
Yes
No
Sunday, May 20th, 2012 AT 9:15 PM
Tiny
SATURNTECH9
  • EXPERT
There you go.
Was this
answer
helpful?
Yes
No
Sunday, May 20th, 2012 AT 10:14 PM
Tiny
BILLMILL5050
  • MEMBER
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
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 8:18 PM
Tiny
BILLMILL5050
  • MEMBER
Another pic
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 8:24 PM
Tiny
SATURNTECH9
  • EXPERT
Thats a bad pic can you take a actual pic of it and post it or email it to me?
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 8:28 PM
Tiny
BILLMILL5050
  • MEMBER
Ok ill post if not where do iu e-mail u?
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 8:58 PM
Tiny
BILLMILL5050
  • MEMBER
3 more
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 10:25 PM
Tiny
BILLMILL5050
  • MEMBER
1 more
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 10:30 PM
Tiny
BILLMILL5050
  • MEMBER
Where did you get your diagrams at?
Was this
answer
helpful?
Yes
No
Friday, July 13th, 2012 AT 10:33 PM
Tiny
BILLMILL5050
  • MEMBER
I ran ac it open & closes a door when u go from ac to max ac
Was this
answer
helpful?
Yes
No
Saturday, July 14th, 2012 AT 12:13 AM
Tiny
SATURNTECH9
  • EXPERT
Thats your recirculation door actuator.
Was this
answer
helpful?
Yes
No
Saturday, July 14th, 2012 AT 12:25 AM

Please login or register to post a reply.

Recommended Guides