Heater blend door actuator

DEWYROCKS

MEMBER
2002 CHEVROLET 2500
6.0L
V8
2WD
AUTOMATIC
195,000 MILES

Your video is the same as my truck for the blend door replacement. My only question is. What’s the re-learn process for it?
A battery disconnect or a re-learn from a tech 2?

Wednesday, January 15th, 2020 AT 5:59 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,959 POSTS

Hello,

Here is how to re-calibrate the blend door actuator in the video:

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.
- 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.
6. Wait 60 seconds before installing a scan tool.

Here is the video:

https://youtu.be/tY6M92fA2ug

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