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in the process of Kuhle conversion on my 1980 928, new compressor, drier, expansion valve and charged had cold air for two days then a couple of times brief cold air and then none. compressor would seem like it was trying to come on but would not fully engage. Multimeter showed 7 volts on the pressure switch on the drier. Tested the freeze switch on the fire wall and had 11.6 volts coming into the switch but nothing out. jumpered the two wires that were attached to the freeze switch and now compressor works, fan works, and have cold air. My assumption it is my freeze switch and not the relay in the control module?? cannot find a freeze switch or anti freeze switch that looks like my current switch. any ideas were to find one. david