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The heater control in my 1991 Chev seems to be giving me some grief. The odd time the screen would turn off, but it still was blowing heat.Then as soon as the screen went off, it would come back on again. Now it is isn't working at all. I wiggled the wires at the back of the controller, still nothing. I put in a used one from the wreckers, still nothing. I checked the heater fuse, its good. I am guessing a ground problem, but where would the most likely places be to look? Thanks in advance for any ideas.:burnout
 
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