Air Conditioning
The four air conditioning modes are marked in blue on the air vent selection switch.
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 operates at a slower speed. If the overheating or overcurrent condition continues, the motor shuts down and stops completely. The motor resumes normal operation after the motor has cooled or the overcurrent condition has been resolved. It is necessary to cycle the fan switch off, and then on, to reset the motor. If the problem appears repeatedly, take the vehicle to a Freightliner dealer or authorized service outlet for repairs.