Town & Country V6-4.0L (2008)
Control Assembly: Description and Operation
Front Control
Automatic Dual Zone With Rear Heat and A/C
AUTOMATIC DUAL ZONE WITH REAR HEAT AND A/C
The A/C-heater control (1) for the automatic temperature control (ATC) dual zone front 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. Primary control for the rear heater-A/C system is also on the
front A/C-heater control. An infrared sensor located in the overhead console detects thermal radiation emitted by the front seat occupants and their
surroundings. All controls are identified by ISO graphic symbols.
FRONT CONTROL PANEL
The front A/C-heater control (1) and integral computer is located in the instrument panel and contains:
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three rotary temperature controls (2) to select both of the front and the rear comfort temperatures from 15° to 29° C (60° to 85° F). Comfort
temperatures for each zone are shown in the vacuum-fluorescent (VF) digital display (5). If the set temperatures are 15° C (60° F) and is adjusted
lower, the A/C-heater control will attempt to achieve the lowest temperature possible, but the display will show LO. If the set temperatures are 29°
C (85° F) and is adjusted up, the A/C-heater control will attempt to achieve the highest temperature possible, but the display will show HIGH.
Temperatures can be displayed in either Metric or Fahrenheit, which is selected from the overhead console.
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a rocker switch front fan speed control (3) that can override the Auto mode. A bar graph is shown in the VF digital display to indicate the selected
or determined front fan speed (depending on manual or Auto mode).
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a push button front window defogger control (4). An indicator lamp illuminates in the control when selected manually and an ISO symbol appears
in the VF digital display when selected by Auto mode.
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a push button air recirculation control (6). An indicator lamp illuminates in the control when selected manually and an ISO Recirculation symbol
appears in the VF digital display when the system exceeds 80 percent circulated air under Auto mode due to high A/C demand.
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a rocker switch front mode control (7) that can override the Auto mode. An ISO mode symbol appears in the VF digital display to indicate the
current mode setting when selected manually or by Auto mode.
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a push button A/C on/off control (8). An ISO Snowflake symbol appears in the VF digital display when the A/C system is in operation, whether
under manual or Auto mode.
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a push button automatic mode control (9) to set the heating-A/C system to Auto mode. FRONT AUTO appears in the VF digital display when the
system is in Auto mode.
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a rocker switch rear mode control (10) that can override the rear A/C-heater control and the Auto mode. An ISO mode symbol appears in the
center portion of the VF display to show the current mode setting when selected manually or by Auto mode.
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two push button front heated seat controls (11). Each control has an indicator lamp that illuminates when selected.
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a push button control that locks out the rear heater-A/C controls (12), allowing only the driver and front seat passenger control of the rear
heating-A/C system. An indicator lamp illuminates in the control when selected.
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a push button on/off control (13) that turns the rear heating-A/C system completely off. The center portion of the VF display is blank when the rear
heating-A/C system is off.
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a push button rear window defogger on/off control (14). An indicator lamp illuminates in the control when selected. The indicator lamp illuminates
in the control even with the heating-A/C system turned off.
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a rocker switch rear fan speed control (15) that can override the rear A/C-heater control and the Auto mode. A bar graph is shown in the center
portion of the VF digital display to indicate the selected or determined rear fan speed (depending on manual or Auto mode).
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a push button synchronize control (16) that synchronizes the temperature of all three of the comfort zones to the drivers selected temperature.
SYNC appears in the VF digital display when the system is synchronized, whether under manual or Auto mode.
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a push button on/off control (17) which allows the heating-A/C system to be completely turned off. The display is blank when the heater-A/C
system is off.
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illumination lamps for backlighting of the control.
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computer logic that remembers the settings of the controls when the ignition is turned off and retains those settings after a restart. If the system is
off when the ignition is turned off it will be off when the engine is restarted, etc.
