Hi,

Hope someone can help with an issue I am having with my M3 A/C. In the morning when it is cool the A/C seems to work ok. It blows a little colder than the ambient air. In the afternoon when the outside temperature gets up to 80-90 deg F it doesn't put out any cold air. It is if it just shuts down. I have checked to see if there is enough R134 in the system by using a gage at the inlet port. I put a little in but the gage showed the system had enough.. I have noticed a "switch" inline with the intake line and wonder if this is shutting down the compressor or some other part of the system. Just changed both serpentine belts and pulley on compressor is turning fine.

Any suggestions would be appreciated...
Thanks,
Torger