[ta]

2012 E70 35d with 112000 miles and original A/C compressor. Can't seem to pinpoint A/C issue that just started a few days ago:

1. A/C had been blowing cold and working fine.

2. Now somewhat cool air blowing out of drivers side (front and back as I have rear climate control). Passengers side front and back blowing HOT.

3. Clutch is engaging and radiator fan is working (although not necessarily changing speeds like my E90 when the blower fan control is changed from low to high).

4. Only fault I see is "Modular PTC 009C69". All faults were cleared and the 9C69 came back.

5. Ambient temperature around 90-100 degrees here in Phoenix. A manifold gauge initially showed low side 20 PSI and high side 100 PSI. I added approx 8-10 ounces of R134 and now the readings are low side 35 PSI but the high side is only 125-130 PSI, which I think is too low. This brought down the drivers side a little cooler (but still blowing 80 degrees or so) but the passenger side still blowing HOT.

6. No faults appear for the Heater Control Valve, such as "A72E water valve". I felt each hose coming out of the heater control valve and both appeared cool (definitely not hot) to the touch.

Anyone have any thoughts on next steps? Since I don't know exactly how much R134 is in the vehicle, at this point I can't rule out it being overcharged with me adding more at this point. With the high side PSI lower than expected, does this point to a compressor issue or something else?