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I'm given to understand that when I buy a new compressor it wont' come with the switch I've indicated with an arrow. I can't seem to get it out of the old one. I've had blaster fluid in there for a couple of weeks now and still can't get it out.
AIR PRESSURE is your friend.
I always 'leak-test' the A6 compressors when I install an 'O'ring kit.
Here is the plate I made for pressure testing but you could put your thumb over one port and use a 'blow-gun' on the other without the plate to force it out. Place a rag or something to catch it on it's way out!!!!!!!!!!!!!
In the absence of a more delicate way to remove the switch I decided on muscle. I used a needle nose vice grip to get a good grip, then another vice grip onto the needle nose perpendicular clamped to it. Then a hammer to rap on the 2nd vice grip to bang it out. Out it came - none the worse for wear and reusable.
Ok, now that the switch is out, look inside the hole. You'll see a small orifice, maybe 1/16th inch. Note the location of the orifice within the hole and compare to your new compressor. Is it the same? Hopefully, yes.
If the orifice is dead center in the hole the the compressor is the "superheat switch" type....which would have been standard issue on a Series II and almost all Series IIIs.
If the orifice is offset to the side you have a "HSLP switch" compressor-- high side, low pressure switch.
I mention this because, at replacement time, sometimes the wrong compressor and/or switch is sold under the theory that A6 compressors are "all the same".
Don't know whether to start a new thread or not... but I just watched a few YouTube videos on making your own A/C hoses and I'm intrigued. Anyone ever done it?