TM 10-3930-675-100005 00-23OPERATION UNDER USUAL CONDITIONS - CONTINUED0005 00OPERATE HEATER AND DEFROSTER - CONTINUEDOPERATE AIR CONDITIONER1.Start engine and bring truck to normal operating temperature.2.Press air conditioning control switch to the ON position.3.Rotate air conditioner temperature control switch clockwise to desired position, to control air conditioner output withinthe cab.4.Rotate fan switch clockwise to adjust fan speed from low to high.5.Press cab air circulation control switch to select either of two options, recirculated or fresh air within the cab.NOTEAir vents are located at each rear corner of cab, as well as on instrument panel.6.Control air flow as needed by adjusting louvered openings of air vents.AIRVENTHEATER ANDDEFROSTERSELECTIONSWITCHFANSWITCHHEATERTEMPERATURECONTROLSWITCHAIRVENTCAB AIR CIRCULATIONCONTROL SWITCHAIRVENTFANSWITCHAIR CONDITIONINGCONTROLSWITCHAIR CONDITIONERTEMPERATURECONTROLSWITCHAIRVENTCAB AIR CIRCULATIONCONTROL SWITCH
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