1994 jeep cherokee country 4.0, 4WD, automatic, 150,000 miles.
Very loud howl coming from passenger side under glove box when in a/c or defrost mode.
Occurs when outside temperature is above 80 degrees and only at idle or low engine rpm.
Blows cold air and fan speeds work. Noise is the same no matter what the fan speed. No howl when in vent or heat mode.
The problem started soon after I had the system re-charged.
Monday, August 20th, 2007 AT 9:21 AM