I think your refering to the door in the heater housing that directs air to vents, floor or defroster vents, there is also a blend actuator that mixes heated or cooled air to give the correct temperature from the selector.
IT COULD BE THE THERMOSTAT, THE VEHICLE BEING LOW ON COOLANT, OR A MODE DOOR WITHIN THE DASH
fix the problom that put it in limp home mode then reset the computer
Transmission is in limp mode and most likely it is the input or output sensor or a wiring problem to one of them.
transaxle wiring harness
The transmission computer has detected a malfunction and set a trouble code.
You need to have the faults in the transmission read.
Overrride the valet mode in an xj8 2000 jaguar
Are you ever out of luck, cause you need to remove the door panel to rectify, but you need to open the door to remove the door panel.....
G-Mode was created in 2000.
on build mode. when you click on the build mode icon, you'll see a picture of a house... click on the door and there they are.
By pass the door mode. The Dome light should have a 3 way switch OFF - Door open on - Constant on Move the switch to the off mode, and light should not come on when door is opened.
Kernal mode.