Should you ever have any pressure differences in the climate HD to ND......then as ALLERERSTES the throttle is a suspicious candidate

At a well-known V8 out of the forum, after correct filling mnit, it pressed the refrigerant from a valve of the comp after the correct amount during the compressor operation "machine gun-like" (the coupling was given a bridging)....As a diagnosis, a "clogging" was diagnosed after a short logical thought.

Here are photos of the "climate heart valve".......which had already sooo firmly baked in the tube that I let go of prayer !!!
In the next appendix then as it should actually be......the mechanical abrasions excluded