Odd AC problem
#1
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Join Date: Jul 2013
Location: Tacoma
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Year: 1999
Model: Cherokee
Odd AC problem
I turned on the AC and it sounded like something was stuck in the AC vents on the dash. The sound was very loud so I switched the AC from 4 to 0 and back to 4. The noise quit. All was calm and cold. What the heck! Has this happened to anyone? The last time it did it to me I was on the highway and it went for a couple minutes sounding like a card stuck in a plastic fan very close to the vent opening.
#6
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Join Date: Apr 2012
Location: Wisconsin
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Model: Cherokee
Direct the airflow to the floor vent. When you step on the gas does it temporarily switch to the defroster? If so your vacuum check valve is leaking. Could be whatever's hitting the fan in there is getting moved around by the damper door.
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