Thread: hissing sound
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Old 07-01-2003, 11:52 AM
G-Benz's Avatar
G-Benz G-Benz is offline
Razorback Soccer Dad
Join Date: Apr 2001
Location: Dallas/Fort-Worth
Posts: 5,711
I believe that not all hissing is abnormal...the cycling of the compressor as it pressurizes will cause that sound. Mine always had, regardless of freon levels...
2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car
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