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My heat/ac switch on my class A winnebago when I am driving down the road if I put the switch on high it will turn off but if I leave it on med. or low it will be fine but some times I need that high speed, Is my switch in the dash is bad and all I got to is replace it or is it something diffence. thanks Harold.
Hi Mike here.My Winnie A did the same thing,look for a bad ground connection on the Hi speed relay in the dash.Mine was about in the center of the dash.Make shure that you have voltage to tne relay and a ground.You might even feel if clicks when turning fan to high.Hope this helps.