I have a 2008 peterbilt 389 and the temperature control switcher is not working(windshield to feet and to the cab)it is in only one position.Anyone know what could be the problem is?
Actuator in dash. Under the glove compartment if you remove that plastic piece 3 actuator motors. Fan speed, temp and direction. Don't remember which is which but it's simple fix. Remove the panel and you'll see them. Could be the door that actuator moves is sticky or stuck too but likely the actuator itself.