Quote:
Originally Posted by Arthur Dalton
A much more probable diagnosis is the pressure switch is not closing b/c the a/c system has No Refrigerant left to close the switch..meaning a leak.
.. press the shrader in and see if there is any pressure left in the system.
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Still pressure in the system although it feels undercharged. Maybe it just needs a charge. It's an 88 300CE so would oem be R12? How do I tell if it has been upgraded to R134? Stay with R12 at this juncture?
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