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Old 12-26-2001, 02:48 AM
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W126 AC wheezing

Strange I know but today with the ac set to 20c I turned the stereo all the way down and could hear the ac wheezing. Almost sounded like someone breathing in and out. Also the sound seemed to get louder as I accelerated. There didn't appear to be any pattern to the timing of the sound. I have had the car in for an ac inspection about a week earlier and they said everything was fine and just blew threw an anti bacterial spray. Appreciate anyones thoughts on this, this is definitely a new sound that has developed over the last few days.


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Old 12-26-2001, 08:04 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,397
My initial thought is a vacuum system or damper actuator problem. Try to "feel" a difference in air flow from one of the vent discharge. Put your hand over them one at a time and see if you can "feel" the air flow speeding up or slowing down in time to the sound.
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Old 12-26-2001, 02:45 PM
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I am about to take a 1500 mile road trip so I will get my passenger to check the vents when I hear the sound again. I will report back with my findings.


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