I'm looking at doing an R12 to R134a conversion on my mothers 92 Mazda 626 DX. The current accumulator/drier has a pressure switch on it, do I need to replace it or add an additional one? The compressor went out so I'm replacing it, the accumulator/drier, expansion valve, and flushing the system. Is there anything else I need to look at doing or replacing as well?
Thanks in advance.
That's a "trinary" switch, which provides both high and low pressure protection, it's all you need. Unscrew it from the old receiver drier and put it on the new one.
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