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Old 08-10-2003, 03:50 AM
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Join Date: Jun 2002
Location: Melbourne, Australia
Posts: 80
Angry More a/c problems

My A/C is not functioning properly. The fan and compressor seem to work only at certain speeds or rpms. At stationary, no fan noise or cooling can be heard or felt. After I have accelerated a distance, it comes on and when I release the accel. it goes off and comes on again when I step on it. Funny or normal??? The windscreen takes ages to clear so the system is not dehumidifying quickly enough and can be dangerous. Can't wait to move off for too long. At the most 3 minutes from engine start, more and it will seem like somethings very wrong. The heater function is working. A/C is not very cold, not enough anyway. What can be wrong with it besides the drier tank glass window at the top having a crack in the glass right across, but with no moisture leak apparent.

1994 Euro C180 Elegance auto.
Otherwise running fine.
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Old 08-10-2003, 05:08 AM
BenzMatic's Avatar
You can do it
Join Date: Jun 2003
Location: OC S. California
Posts: 120
It sounds like speed related problem, check following:

RPM/speed sensor on the back of Compressor.
Check your A/C belt, it might be slipping.
Low freon can cause this situation also, since at low pressure compressor will cut.

Hope this helps
87 420 SEL
Looking for a nice mid 80's MB diesel.
87 BMW 528e (Sold)
99 TOYOTA 4Runner
1989 Honda Accord (Sold)
1988 Honda Accord (Total)
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