Air con fault.

[boulecoq]

Hi, I have a 2004 E64 petrol. I’ve recently had my air con diagnostics done and two faults come up. One is the AUC module. I know where that is and will replace it. But the other fault is a refrigerant coolant check valve fault. Is it a check valve or is the diagnostic telling me just to check the valve.Can anyone tell me where I can find it. Thanks

[Oxedizer]

AUC Sensor: (On bulkhead next to the bonet /hood switch) It controls the "auto" recirc function only.

eBay item number:

132374862273







Unsure about the refrigerant coolant check valve fault, maybe the heater circulation valve?

Located under the positive battery terminal (next to left rocker cover)