Control-A/C Heater-MTC Single Zone
WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
The A/C-heater control (1) 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 A/C-heater control and integral computer is located in the instrument panel and contains:
- a rotary control knob for temperature control of the discharged air (2).
- a rotary control knob for recirculation and mode control of the discharged air (3).
- a push button rear window defogger on/off control (4). The defogger button contains an LED that illuminates when the rear window defogger system is in operation.
- a push button A/C on/off control (5). The Snowflake button contains an LED that illuminates when the A/C system is in operation.
- a rotary control knob for fan speed selection and turning the heating-A/C system off (6).
Prior to replacing an A/C-heater control, check for any diagnostic trouble codes (DTCs) related to the heating-A/C system and run the calibration procedure to verify that the concern is not a system issue. See DIAGNOSIS AND TESTING and refer to HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS article.
The A/C-heater control cannot be repaired and must be replaced if found inoperative or damaged.