I have a 2004 BMW X5 E53 with no cold air when A/C is turned on.

1. I have had the system vacuumed and refilled
result: a hint of cold for a few minutes but then just ambient 80 degree air

2. ODBII - no faults

3. Compressor clutch engages and condenser fan works

4. Low pressure line was high on 1st canned R134a gauge check

Question: how would I determine if the issue is the Expansion Valve?


*NOTE: I have not tested with PSI hi/lo gauges yet