RAM 3500 Truck 2WD L6-5.9L DSL Turbo (2008)
Control Assembly: Description and Operation
Manual Dual Zone
MANUAL DUAL ZONE
The A/C-heater control (1) for the manual temperature control (MTC) dual zone heating-A/C system allows both the driver and the front seat passenger
the ability to individually regulate air temperature for their side of the vehicle. All controls are identified by ISO graphic symbols.
The dual zone A/C-heater control and integral computer is located in the instrument panel and contains:
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a push button A/C on/off control (2). The Snowflake button contains an LED that illuminates when the A/C system is in operation.
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a push button MAX A/C air recirculation control (3). The Recirculation button contains an LED that illuminates when the recirculation function is
activated for high A/C demand.
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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.
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two slid-type control levers for individual driver and front seat passenger temperature control of the discharged air (5 and 6).
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a rotary control knob for mode control of the discharged air (7).
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a rotary control knob for fan speed selection and turning the heating-A/C system off (8).
The A/C-heater control is diagnosed using a scan tool See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic
Trouble Code Tests and Associated Procedures .
The A/C-heater control cannot be adjusted or repaired and must be replaced if found inoperative or damaged. The illumination lamps for the A/C-heater
control are available for service replacement.
