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Lack Of Or Insufficient Cooling
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Temperature slide lever 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 slide lever to warmer setting.
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Low-pressure switch on - insufficient refrigerant level (bubbles in sight glass).
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See your John Deere dealer.
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Heater valve partially on - (with temperature lever in max. air conditioning, feel both heater hoses on right-hand side of cab. If both are warm, valve is open).
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Adjust control rod through tray opening. Move lever to OFF. Loosen set screw in balljoint and when applying slight pressure down on rod, tighten balljoint.
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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 lever to warmer setting.
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