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I posted this question in the ex. forms but thought Id try here as well.
Its like my heater is loosing memory. When I start the truck the heater is off every time (have to turn it on manually) it always defaults back to 75 A/C. If you turn the truck off then back on within ten seconds the heater will come back on where I left it. Anything longer it stays off till I turn it back on manually. Headlights on or off or turning the switch does nothing.