Hvac Door Actuator Problems

If the hvac manual or hvac automatic control modules are replaced an automatic re calibration of all the actuators will occur.

Hvac door actuator problems. Learn how to reset the hvac actuator with acdelco. It s pretty easy but. The electrical valves had all kinds of problems. Vehicle programming and relearning service programming system sps for the latest calibration software.

I love my truck but i wish ford. Remove mode door actuator linkage if it didn t fall off 5. They also can get stuck if their mounting clamp is too tight. The summer weather is here and i noticed my air conditioner was not quite keeping up.

Thanks quote ok so as you might have guessed by now you need to perform a re learn. Remove center vent 3 philips screws and stick hand down to reach door. I only changed the blend door actuator. First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or vent mode controls are moved.

Over a few days the driver side air started to get warmer and the passe. For the last 20 or 30 years in these trucks they have been prone to failure. The hvac control head uses its pre programmed logic and actuator endpoints to position the door correctly. The blend door actuator was held in by 2 screws and an electrical connector.

A trouble code may set if the components start to wear and the endpoints drift too far from the pre programmed. The actuator would twist itself out of the valve body leaving the valve stuck in a random position. Try and move it to get unstuck. An actuator can go bad in of two ways.

The vacuum controlled valves are dependent on 18 to 22 in of vacuum from the vacuum pump. Next the plastic gear set will become brittle and break which will sometimes allow the unit to work while making a ticking or clicking noise and then stop. Try to turn the two gears on the side of the hvac housing. You can put your hand back there and feel if the arm is moving and opening closing the door.