Join Date: Jun 2001
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Re: a/c works to well ? 1989 GEO TRACKER
There is probably a thermostat on the evaporator, either stuck into the core, or in the airstream on the outlet side of the evaporator. Chances are it's stuck closed. This is probably the part you're looking at on the schematic. It's a PITA to get to.
The switch on the dryer is just a safety, it opens if the liquid line pressure goes too high, or if the charge is lost.
The thermostatic switch on the evaporator is what actually cycles the compressor.