A/C Pressures [Archive] - Bimmerfest - BMW Forums

: A/C Pressures

09-25-2012, 07:41 PM
Where can I find the specs for low and high side pressure in the air conditioning system?

My air is blowing a bit warm. After a drive, I measured it blowing at 78, but I expect the a/c to blow in the 50-55 range. After hooking up some gauges and running it at 1500 RPM, I got measured it almost down to 65, but still not as cold as I'd expect.

In any event, the low side pressure held steady at 50 psi, while the high side was at 350 psi. Ambient temperature was 90. Those pressures seem high to me. Any idea what they should be?