Hvac Blend Door Actuator Recalibration

On 2001 2002 models a scan tool cannot be installed during the.

Hvac blend door actuator recalibration.

The blend and mode doors on late model chrysler vehicles are driven by dc servo motors. If the motors get out of synchronization the control head doesn t know where they are. If your vehicle has manual controls a recalibration is not possible or needed. Recalibrate chrysler ac control head how recalibrate a chrysler heater control.

Blend door actuator motor calibration. Turn ignition key to the on position and turn on the hvac system. If you happen to have auto controls the temperature door recalibration is performed as usual but the fuse will be labeled rdo batt. Open hood bonnet for the rhd guys and locate fuse 15 in the fuse box next to the battery.

That can result in cold air when you command heat and vice versa. On the gmc acadia and the chevrolet traverse the replacement part number for the blend door actuator is 15 73989. Although the internal components remain exactly the same the case that holds them and the mounting holes differ between year make. This actuator assembly might fit a few other models but double check the part numbers for your car.

The hvac control head expects to see the actuator move to a certain position with the given signal provided if the door gets outside of that preprogrammed position the controller becomes confused and attempts to try and find the correct position by continually searching for it or will stop once it reaches its default position. It only applies to the temperature door actuator. When replacing any of the hvac actuator motors mode door or temperature blend the hvac system will have to go through a relearn or calibration process. The hvac control head expects to see the actuator move to a certain position with the given signal provided.

Okay the only recalibration procedure is for a system that has auto controls.