HARNESS AS-LIGHTING 3104967 - Caterpillar

Fan Control
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The Fan Speed Switch for the Heating and for the Air Conditioning (1) - The fan speed switch controls the four-speed blower fan motor for the heater, air conditioner, and fresh air.
Off (2) - Move the switch to this symbol in order to stop the blower fan.
Low (3) - Move the switch to this symbol for the lowest fan speed.
Medium Low (4) - Move the switch to this symbol for a higher fan speed.
Medium High (5) - Move the switch to this symbol for a higher fan speed.
High (6) - Move the switch to this symbol for the highest fan speed. Control of Air Flow
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Six air vents that are adjustable are located on the console.
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Turn the wheel at the left or use the tab at the right in order to direct the air flow.Temperature Control for the Heater
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Temperature Variable Control (7) - Turn the control as far as possible, counterclockwise in order to close the heater valve. The heater valve controls the amount of hot water that flows through the heater coil. As the control is turned clockwise, the heater valve is opened. Turn the control as far as possible, clockwise for maximum heat. Turn the fan speed switch to the desired speed. Note: Turn the control as far as possible, counterclockwise and turn the blower fan motor ON in order to bring outside air into the cab that is the same temperature as outside air.Air Conditioning System Operation
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Air Conditioning - Turn control (7) as far as possible, counterclockwise in order to close the heater valve. Press the top of switch (8) in order to activate the air conditioning system. If the air is too cold, adjust temperature control (7) until the temperature inside the cab is comfortable. Turn the fan speed switch to the desired speed. Press the bottom of switch (8) in order to turn off the air conditioning system. Pressurizing the Cab
When heating or cooling is not desired, pressurize the cab in order to prevent dust from entering. Turn control (7) as far as possible, counterclockwise in order to close the heater valve. Press the bottom of switch (8) in order to turn the air conditioner to the OFF position. Turn the fan speed switch to the fan speed that is needed to keep dust out of the cab.Defogging the Cab
Activate both the air conditioning system and the heating system. Turn the fan speed switch to one of the four speeds. Use the fan speed that is needed to remove moisture from the air in the cab. This will prevent moisture from forming on the windshield and the windows. Adjust the temperature variable control clockwise in order to lower the moisture level. Adjust the temperature control until the temperature in the cab is comfortable.