Have system professionally recovered and recharged to spec before going further

Interesting. We don’t see that many here in Texas

How long did you pull a vacuum?
The markings on the low side gauge are very inadequate. If you do not have a vacuum gauge you would need to vac for at least an hr.
Also if you used the gauge markings to show that it held vac, then you were probably misled

You really need to incorporate your questions on a separate thread else the staff members such as Dougflas and others may not see it

Your issue with a westfalia has come up before on this forum, but I don’t recall anyone posting results. This could merely be because many posters never give feedback unfortunately. Or because their project/approach /methods did not work. Do a search here. I am not understanding the concern with lon...

Hello, I wish I could help you but this is above my pay grade.
There are other consultants here who might be able to help, but plz recall that as a voluntary forum they are on here randomly.
I would suggest waiting patiently or recontacting the mfg

12V comp will exhaust the capability of your battery and electrical system.
There are no Teslas on the road in the summer daytime heat in Arizona

I am suspicious of the expansion device not opening sufficiently .
Has the system ever had a compressor grenade

Unbeknownst to many, schraders seldom accomplish total sealing. The final seal is actually the plastic cap that goes over the shader. I have worked on cars that had no sealing caps at all…..and they all leaked using a sniffer. I have a kit of assorted caps to correct this problem. For some unknown r...

All that matters to a pressure switch is pressure, whether vapor or liquid