Question about Hyundai Motor 2004 Sonata

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Screeching noise when I turn on my air conditioner or heater

When I start my car in the morning, it makes a terrible screeching sound. I discovered that the noise only occurs if I have the air conditioner or the heater on. When I shut it off, the noise stops. Or, if I rev up the car a little bit, the noise will stop then.

Is there a belt in there somewhere that needs replaced?

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  • Anonymous Mar 16, 2009

    I have some issues here when I turn on my car air-conditioner in the morning and it gives me the screeching noise from the boost.


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  • Hyundai Master
  • 1,779 Answers

It may just need to be adjusted (it sounds like it's too loose). If the belt isn't cracked or frayed, you should just have it tightened up a bit . If there are signs it is worn (cracked frayed) replace it.

Posted on Oct 24, 2008

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