Is switch bad on my pickup if, the acurator motor is not opening the heater box door for inside when max ac?
Is this an early model Chevrolet in the 1990's? If it is there is a link on the motor actuator, under the dash, that has fallen off. When it falls off you will have either full defrost with no max. ac from the dash, or you will have max ac from the dash with no defrost. Get upside down under your dash with a small flashlight so you can get your head in there to find it. If this is the case it will go right back on. It is located up under the dash just to the right of the steering column. Good luck.
