JLG 4017PS Operator Manual - Manual (Page 70)

Section 3 - Controls and Indicators
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Heater and Air Conditioning Controls (if equipped)
19. Fan Speed Switch: Adjustable rotary switch.
20. Recycle/Fresh Air Switch: Adjustable rotary switch.
21. Temperature Control Switch: Adjustable rotary switch.
22. Air Conditioning Switch: On/Off switch.
OZ3830
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