Part number for the switch is 004 820 68 10. List price is $32.50. You
can probably get it at less then list from one of the online parts
I would replace it. There is no downside other then the shortened fan
life, but switches are cheaper then fans.
If you are doing a conversion, BE CAREFUL which fan pressure switch you get.
The original is calibrated for R-12 pressures and the one you will want is
for R-134 pressures - their chemical properties are not the same so you'll
also need a new low pressure compressor cut-out switch when there's not
enough R-134 in the system.
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