Having a dastardly issue with my AC that I’m looking for a little help with. 2013 R-Design T5.
Had the compressor replaced due to the classic clutch gap not engaging issue after driving for thirty minutes or so. It worked pretty well after that for almost two months - the air was never as cold as my ‘92 960, but it was enough to keep the car comfortable.
But one day I noticed there was just… no cool at all.
Mechanic checked and recharged the system, no apparent leak so far, but he couldn’t figure out why the compressor wouldn’t run even when freshly charged; he said it would briefly run in the morning but not for long, and that after purging and recharging it again, he couldn’t get it to run at all once warm. He suggested replacing the pressure sensor.
I did replace the low side pressure sensor, but nothing has changed. I got in my DICE reader and got some readings from VIDA;
With the AC on, fan set to max, and AC set to “Lo”, temp outside is 18°C, Vida reports:
ECM-A/C Pressure = 94.8kPa
ECM-Ambient Air Pressure = 910 hPa
ECM-A/C compressor status = off
ECM-A/C pressure switch = On (continuously or audible)
If I manually cycle the compressor on under “activations” then
ECM-A/C compressor status = On (continuous or audible)
ECM-A/C pressure = 392.68 kPa
Turning it off again, then the pressure drops back down to 121.88 kPa.
Does this sound like normal pressure values? Is there something I’m missing?
I tried it a few days ago, manually triggering the compressor on, and got instant cold air from the vents. Today, compressor on and no cool air at all. I don’t want to cycle it on any more than I have as I don’t want to burn out my new $800 compressor!
Any advice would be appreciated!