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Air Conditioning, Optional
There are four air conditioning modes on the air se-
lection switch. The air conditioning settings on the air
selection switch are blue, in addition to the selection
between the air conditioning bi-level mode and the
face mode.
IMPORTANT: Operate the air conditioner at
least five minutes each month, even during cool
weather. This helps prevent drying and cracking
of the refrigerant compressor seals and reduces
the chance of refrigerant leaks in the system.
NOTE: The heating and air conditioning system
has a brushless blower motor with a protection
or shutdown mode to prevent damage due to
overheating and overcurrent conditions. If the
brushless blower motor goes into a protection
mode, the motor will operate at a slower speed.
If the overheating or overcurrent condition con-
tinues, the motor will shut down and stop com-
pletely.
The motor will resume proper operation after the
motor has cooled or the overcurrent condition
has been resolved. It will be necessary to cycle
the fan switch off, and then on, to reset the
motor. If the problem appears repeatedly, take
the vehicle to an Freightliner dealer or autho-
rized service outlet for repairs.
Heater, Ventilator and Air Conditioner
6.4