My 2006 is showing the following code. b1b76-00 (2f)

Heating and Air Conditioning issues. I have an issue with my HVAC system in my 2006 Range Rover Sport. The lower left side left hand drive. (driver’s side) actuator seems to be out of sync. The motion of the actuator motor does not seem to correlate with the blend door open/close motion. For example, the blend door seems to move from 6 o’clock to 9 o’clock. The Motor wants to move from 3 o’clock to 6 o’clock.



I got an assortment of actuator motors out of a wreck along with a few others. I plugged them all in and was hoping that one would move in sync with the blend door shaft that opens and closes the blend door. No such luck.

I then tried to start the calibration process by holding the recirc button and the econ button at the same time when turning the key to the ready position. When I plugged the motors in, they seemed to run a calibration process, some switching forwards and backwards, some rotating a 360, etc. None of them seemed to correlate with the blend door shaft and the fixed positions that the blend door will operate.

Does the calibration process sense the limits of the blend door and adjust the motor to operate within the range that the blend door will move?

Any help is appreciated. Currently the lower actuator is plugged in but not screwed in and mounted to the hvac box. When I want heat, I manually reach down and move the tab on the blend door and push it forward. As long as the fan is at three lights or more, the suction of the fan keeps the blend door with the tab pointing to the forward position. If I turn off the fan or adjust it to two lights or less, there isn’t enough vacuum and the blend door defaults back to closed or open, not sure, but the tab points down.

Anybody? Can the blend door motors be cslibrated? Thx. Phil

bump? Phil