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.
1994 DODGE INTREPID..DISABLE ALARM You can't remove it. It is part of the computer progamming. You should be able to disarm it by unlocking the drivers door with a key, or with remote. If the door key doesn't turn it off, the switch on the key cylinder has come unhooked.