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Lack Of Or Insufficient Cooling
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Temperature control in OFF position.
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Select Air Conditioning position.
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Compressor belt off or broken.
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Replace belt.
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Compressor not functioning (if both the large and small hoses in the left-hand access panel are at the same temperature).
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See your John Deere dealer.
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High-pressure switch ON - insufficient air flow across condenser.
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Clean condenser. Check fan belt condition. Check engine fan speed belt position. Check rotary screen function. If this does not correct problem, see your John Deere dealer.
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Low-pressure switch ON - insufficient air flow across evaporator.
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Clean filters. Check cab fan operation. If this does not correct problem, see your John Deere dealer.
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Low-pressure switch ON - low outside air temperature.
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Move temperature control to a warmer setting.
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Low-pressure switch ON - insufficient refrigerant level.
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See your John Deere dealer.
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Compressor clutch cycles excessively or compressor stays OFF up to 15 minutes.
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Evaporator icing.
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Adjust controls correctly. See Operator's Station. Open louvers. Clean filters. Move control to a warmer setting.
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Bad smell (foul odor) in cab.
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Plugged drain tube. Dirty filters. Dirty cab.
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Blow out condensate tube and clean pan under evaporator. Clean filters. Vacuum out cab.
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Be certain weep valve in condensate drain tube is installed.
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