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Blower not keeping dust out of operator enclosure
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Defective seal around filter element
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Check seal condition
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Check filter for correct installation
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Defective filter
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Replace filter
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Excessive air leak
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Seal air leaks
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Blower air flow too low
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See Blower Air Flow Too Low
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Blower air flow too low
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Clogged filter or air intake screen
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Clean
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Heater core or evaporator core clogged
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Clean
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Heater will not shut off
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Heater hoses connected incorrectly
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See your John Deere dealer
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Cab pressure indicator reads low
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Blower switch off
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Turn switch on
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Blower speed too low
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Use higher blower speed
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Door or window not latched
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Latch door or window
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Restricted fresh air filter
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Clean or replace filter
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Damaged door or window seal
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Replace damaged seals
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Loss of seal around evaporator housing, hoses, refrigerant lines, control linkage, wires, etc.
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Seal any openings
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Air conditioner not cooling
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Low voltage
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Have John Deere dealer check charging system.
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Low refrigerant
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Have John Deere dealer check refrigerant level.
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Belt slipping
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Check belt tension
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Heater on
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Turn heater to off position.
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Compressor stuck
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Rock compressor pulley back and forth
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