Air conditioner funny noise
10

Asked by GuruNTSSG Jun 03, 2020 at 07:11 PM about the 2002 Cadillac DeVille Sedan FWD

Question type: General

While running AC, strange noise interior behind glove compartment every 5
seconds. Sounds like hissing lasting 1 second.

1 Answer
10

markthomas52 answered 3 years ago

sounds iike it could be related to the HVAC system. Either the air mix servo motor that controls the combo of a/c and heat blend to maintain cabin temperature or the blend door servo that controls air flow direction to the selected ducts...upper vents, lower vents, combination and windshield defroster/defogger.

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