Chevy Trailblazer Blend Door Actuator Reset

Disconnect the wiring harness from the mode door actuator the mode door actuator has a white gear extending from one side and is the lower of the two actuators.

Chevy trailblazer blend door actuator reset.

I have a 2002 chevrolet trailblazer ext. An actuator can go bad in of two ways. Now lay on you back with you head in the drivers floor board. Fist thing to do that usually works is perform a reset and calibration of the mode doors and control head.

This grind or click sound is actually the plastic gears stripping inside. A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit. Look up see 2 screws remove them and the panel they hold on. Re install fuses start truck and do not touch a c control head for 2 minutes.

Opening and closing the door can make a difference as the vehicle controls see this as cycle completion. Wait for at least 1 minute. For manual systems it does not matter where the a c controls are set but if you feel the need to do something turn the blower switch on i prefer speed 3 and set the temperature. The topic of how to perform the actuator recalibration procedure on chevrolet gmc and cadillac trucks and suvs has become an ever increasing topic of discussion.

Pull the actuator from the hvac case. This actuator assembly might fit a few other models but double check the part numbers for your car. Blend door ok first put you front seat down and back raise steering wheel. I just replaced the blend door mode actuator which did fix the problem the direction the vents blow but the driver side vents are still blowing warm air.

With the key off remove the hvac b and the hcav 1 fuses from the rear fuse block under the second row seats. Next start the vehicle and drive it a short distance and see how it performs. Are read more. Remove the screws from the actuator.

You may indeed need to replace an actuator. Parts counter people call this the upper actuator.