air con noise

amolak

Active Member
Joined
Mar 22, 2003
Messages
275
Car
B200Turbo & V350
Hi,
There is a sound like (sucking air through a straw) coming virtually constantly through the centre vents. If I turn off the air con, it stops.
Does my air con need re-gasing?
Seems to be heard more at lower speeds.
Car is five years old, with 102k miles.

Thanks

Amo
W140 S280 1998
 

Andy W

Active Member
Joined
Jun 27, 2003
Messages
401
Location
Stoke on Trent
Car
ML 270 cdi
Sounds like a vacuum hose come loose, if it was gas shortage the compressor would either not run, cycle on the pressure switch or you would hear an hissing noise from the expansion device which regulates the flow of refrigerant.
 

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