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On vehicles equipped with diesel engines the blower
fan will initially operate at a minimum speed to
provide you with maximum comfort in the fan auto-
matic mode during cold weather start-ups. Then, as
the engine warms up the fan will gradually increase its
speed. This feature will avoid blowing cold air to the
driver and/or passengers, which increases comfort
level. However, the fan will engage immediately by
adjusting the blower control knob (left knob) to a
position other than HI AUTO or LO AUTO.
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Most of the time, when in Automatic operation, you
can temporarily put the system into recirculation
mode by pressing the Recirc button. However, under
certain conditions in automatic the system is blowing
air out of the defrost vents. When these conditions are
present and the Recirc button is pressed the indicator
will flash and remain off. This tells you that you are
unable to go into recirculation mode at this time. If you
would like to go to Recirculation mode, you must first
move your mode knob to panel, panel/floor or floor,
then hit the recirc button. This feature will reduce the
possibility of window fogging.
Manual Operation
This system offers a full complement of manual override
features which consist of Blower Preferred Automatic,
Mode Preferred Automatic, or Blower and Mode Pre-
ferred Automatic. This means the customer can override
the blower, the mode, or both. There is a manual blower
range used when the AUTO setting is not desired. The
left control can be set to any fixed blower speed by
rotating the knob.
NOTE:
Please read the Automatic Temperature Control
Operation Chart below for details.
UNDERSTANDING YOUR INSTRUMENT PANEL 181
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