2004 Cadillac SLS air conditioning/heater

2004 CADILLAC SLS
54,000 MILES • V8 • FWD • AUTOMATIC
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SHAUN1981
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  • 2 POSTS
My Air conditioner and/or heater- defrost etc. is making is really loud the higher i set the fan, it blows cold but it's really loud, is there a reason for this?
Jul 6, 2010 at 9:05 PM
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FACTORYJACK
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Loud in which way? If there is a rumble type noise, there could be some debris in the blower fan. Have seen over time leaves, foam, parking pass/receipt, dog food, rodents, grass, etc...
Jul 7, 2010 at 10:03 AM
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SHAUN1981
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  • 2 POSTS
is sounds like a loud humming/vibrating sound
Jul 8, 2010 at 9:31 PM
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FACTORYJACK
  • CAR REPAIR CONTRIBUTOR
  • 4,159 POSTS
Sounds like there is some debris in the fan, it would need to be lowered and inspected. Another possibility is a broken impeller, but they are pretty tough.
Jul 8, 2010 at 10:28 PM