The same thing happened to my 94 Saturn SL before we junked it. When we first bought this 98 (used), the air/fan worked fine. Now, at 147,000 miles, the AC does not turn on when you "turn it on". The fan does not turn on when the car gets too hot. The fan doesn't turn on when you try to run the AC. When I turn the AC on, absolutely nothing happens. I checked all the appropriate fuses and they're all fine. Why does the AC/fan stop working on Saturn SLs after a certain amount of mileage?? :(
Do not let this car over heat a blown head gasket will ensue. Locate and replace the fan relay, if that doesn't fix the problem unplug fan and use jumper wires to ground the plug then feed power to the positive side of plug to check fan, if that doesn't work replace the coolant temperature sensor located somewhere near the intake manifold or thermostat housing area.
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