2007 Liberty KJ Factory Service Manual 24 - HEATING & AIR CONDITIONING

CONTROL-A/C HEATER

DESCRIPTION



The A/C-heater control for the manual temperature control (MTC) single zone heating-A/C system allows one temperature setting for the entire vehicle. All controls are identified by ISO graphic symbols.

The heating-A/C system uses a combination of, electrical and vacuum controls. These controls provide the vehicle operator with a number of setting options to help control the climate and comfort within the vehicle.

The A/C-heater control is located in the instrument panel and contains:

  • a push button A/C on/off control (1). The snowflake button contains an LED that illuminates when the A/C system is in operation.
  • a push button rear window defogger on/off control (2). The defogger button contains an LED that illuminates when the rear window defogger system is in operation.
  • a rotary control for temperature control of the discharged air (3)
  • a rotary control for turning the heating-A/C system on and off and for recirculation and mode control of the discharged air (4).
  • a rotary control for fan speed selection (5).

The A/C-heater control cannot be repaired and, if faulty or damaged, it must be replaced. The control knobs and illumination lamps are available for service replacement.

REMOVAL

WARNING: On vehicles equipped with airbags, disable the airbag system before attempting any steering wheel, steering column, or instrument panel component diagnosis or service. Disconnect and isolate the negative battery (ground) cable, then wait two minutes for the airbag system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to take the proper precautions could result in accidental airbag deployment and possible personal injury or death.




1. Disconnect and isolate the negative battery cable.
2. Remove the center bezel from the instrument panel (refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - REMOVAL).
3. Remove the four screws that secure the A/C-heater control (1) to the instrument panel at the mounting screw locations shown (7).
4. Remove the A/C-heater control from the instrument panel to gain access to the wire harness connections (3 and 6) and the vacuum harness connector (5) at the rear of the A/C-heater control.
5. Disconnect the vacuum harness and wire harness connectors from the A/C-heater control and remove the control from the vehicle.
6. If required, remove the illumination lamps (2 and 4) from the A/C-heater control.

INSTALLATION




1. If removed, install the illumination lamps (2 and 4) into the rear of the A/C-heater control (1).
2. Connect the wire harness and vacuum connectors to the connections (3, 5 and 6) at the rear of the A/C-heater control.
3. Position the A/C-heater control into the instrument panel and install the four retaining screws at the locations shown (7). Tighten the screws to 2 N·m (17 in. lbs.).
4. Install the instrument panel center bezel (refer to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT PANEL CENTER BEZEL - INSTALLATION).
5. Reconnect the negative battery cable.