You should begin the A/C heater control service by removing and isolating the negative
Battery Cable to disable the air bag and waiting for the two minutes it takes for the air bag capacitor to lose its charge. First, separate the center bezel from the instrument panel and take out the wiring connector for the clock,
Power Window Switches and accessory switches. While removing the parts, mark the places where you found each control cable. Take a small screwdriver and remove the clips that on either end of the control cables. In addition, remove the clips that hold the control cables to the gear in the mode control and temperature control sectors. Detach the wire harness connections from the A/C-heater control button at the back and set the center bezel on a workbench. In the end, remove the four screws connecting the A/C-heater control to the back of the center bezel and take out the control.