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TM 9-2320-364-10
2-31
Figure 2-11. Heater Controls and Indicators
Key
Control or Indicator
Function
1
FAN Control
Controls speed of the heater fan.
2
DEFROST
Controls amount of air blown on the
windshield or cab floor.
3
AIR Control
Controls amount of outside air entering the
cab through fresh air vent.
4
HEAT Control
Controls amount of hot air entering the cab.
5
Cab Ventilator
Controls amount of air blown from the blower
vents.
6
Blower Vents
Controls direction of air flow.
7
Arctic Heater Switch
Turns ON/OFF power to the arctic heater
pump (if equipped).
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