i just changed my 2005 Sienna AC compressor 2 months ago. Now I have noticed a loud sound when ever I turn my AC on. It gets louder when I slow down or on idle .

Asked by vcwise Aug 27, 2015 at 12:15 PM about the 2005 Toyota Sienna LE

Question type: Maintenance & Repair

The sound is not shrieking but it's like a louder engine-like sound or motor-like, like a loud hum. No vibration noted. I hear when AC is on, especially when I am slowing down or at idle ( maybe because I hear it better then?). But noise is gone when AC off. One mechanic said, I might have a defective compressor. Any ideas?

1 Answer
65,590

firebird338 answered 9 years ago

Sounds like the compressor clutch is slipping. It can be adjusted by the right person that knows what they are doing but since it is not that old where you had it done should take care of it.

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