Blend Door Actuator? Vents don't switch?

This one in pic it'sunder panel by blower so the panel has to come off which isn't hard, but try the fuse pulling thing it may start to work again and reset.

Hello,

This is because the actuator has lost is sensing ability so it "hunts" replace the blend door actuator and the problem should go away.

Here is a guide to help you

https://www.2carpros.com/articles/replace-blend-door-motor

Please let us know if you need anything else to get the problem fixed.

Cheers

There really isn't anything special when flushing the heater core. My only suggestion is to back flush it too. Basically, force pressurized water through both directions.

Hi and thanks for using 2CarPros.

Here are the directions related to replacement of the mode door actuator. All attached pictures correlate with these directions. Note: After the directions, I attached the re-calibration procedures.
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MODE ACTUATOR REPLACEMENT
REMOVAL PROCEDURE

1. Remove the floor air outlet duct extension (1) from the floor duct (2).

2. Disconnect the electrical connection at the mode actuator (10).
3. Remove the mode actuator mounting screws from the HVAC module.
4. Remove the mode actuator as an assembly with the actuator cam.

INSTALLATION PROCEDURE
1. Install the mode actuator as an assembly with the actuator cam.
- Line up the heater/defroster lever with the mode actuator cam slot.
- Line up the A/C lever with the mode actuator cam.

NOTE: Refer to Fastener Notice in Service Precautions.

2. Install the mode actuator mounting screw to the HVAC module.

Tighten
Tighten the mode actuator mounting screw to 1.6 N.M (14 lb in).
3. Connect the electrical connection at the mode actuator (10).
4. Install the floor air outlet duct extension (1) to the floor air duct (2).
5. Calibrate the HVAC module actuators. Refer to Re-Calibrating Actuators.

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Recalibration:

Actuator Recalibration

The HVAC control module will relearn the actuator limits whenever power is disconnected and re-connected to the module.
Use the following steps to perform the calibration update:

1. Turn OFF the ignition.
2. Remove the battery positive voltage circuit fuse of the HVAC Control Module.

Important: The scan tool must be disconnected from the vehicle to properly perform the calibration procedure. If a scan tool is connected before this procedure is completed, then new calibration values will not be stored.

Important: Failure to wait 60 seconds will not allow the HVAC control module sufficient time to clear the old calibration values.

3. Wait 60 seconds.
4. Install the fuse.
5. Turn ON the ignition.

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Let me know if this is what you needed or if you have other questions.

Take care,
Joe

Happy to help. Let me know if you need anything.

Joe