BMW F30 water cooled A/C condenser
2018 BMW 330i has no, or intermittent a/c operation.
A/C high side was running to 400 psi and triggering compressor cycling. The airflow through condenser seemed fine. The customer checked for the correct quantity of R1234yf in system.
Checked parts listing and found the condenser is not air cooled, (technically it still is…), its water cooled and part of the “Low-temperature coolant circuit”.
Body shop drained the coolant from the system and didn’t refill it.
Here are the repair instructions for the Auxiliary Pump
here is a functional description of the system
here is a description of the separate coolant tanks