One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuatoron Chevrolet 1500 Pickup
Average mileage : 110,668 (13,200–164,000)
11 people reported this problem
4 people shared problem details
1990 Chevrolet 1500 Pickup164,000Visitor
heater will not blow hot air and everything is working but hot air is non existant
1995 Chevrolet 1500 Pickup140,000Visitor
When moving selector knob from its current position to any other position, mode door makes a clicking sound as it attempts to move. Haven't replaced it yet as I still need to check if the door is stuck. Even after freeing a stuck, still a good idea to replace motor.
1991 Chevrolet 1500 Pickup125,474Visitor
Took off old actuator and it did not any power so i filped the door around and the heat worked, so I tryed to find a actuator at parts house but never got the right one, i am still looking for the right one .
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