I have a 2002 chevrolet trailblazer ext.
Chevy trailblazer blend door actuator reset.
Next start the vehicle and drive it a short distance and see how it performs.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
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.
This actuator assembly might fit a few other models but double check the part numbers for your car.
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.
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.
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.
This grind or click sound is actually the plastic gears stripping inside.
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.
Remove the screws from the actuator.
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Wait for at least 1 minute.
With the key off remove the hvac b and the hcav 1 fuses from the rear fuse block under the second row seats.
Parts counter people call this the upper actuator.
Now lay on you back with you head in the drivers floor board.
You may indeed need to replace an actuator.
An actuator can go bad in of two ways.
Look to left main wire harness needs to be moved to the right up and behind it is th blend actuator 7 32 socket to remove it then manually turn the white peg total labor 30 min.
On the gmc acadia and the chevrolet traverse the replacement part number for the blend door actuator is 15 73989.
Look up see 2 screws remove them and the panel they hold on.
Blend door ok first put you front seat down and back raise steering wheel.
