PT Cruiser Forum

smithcruiser · #1 (**permalink**) 07 Aug 2009, 07:21 pm

How can I check the High Side Pressure Switch on the AC. Fan does not come on when AC is on. Fan works when engine temp rises.

CREWZIN · #2 (**permalink**) 07 Aug 2009, 08:39 pm

What you just described is not the switch but the low speed part of the fan. It should come on with the A/C.

smithcruiser · #3 (**permalink**) 07 Aug 2009, 10:31 pm

is that one of the relays that is under the hood that could be bad? I notice there are two in the fuse panel under the hood.

CREWZIN · #4 (**permalink**) 08 Aug 2009, 05:49 am

Yes, The high speed relay can be swapped with the horn relay to see if it's working but the low speed is a separate switch. There might be a way of testing it but I don't know how.

smithcruiser · #5 (**permalink**) 08 Aug 2009, 08:24 am

Thanks for you help I will test it out today.

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