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Drafts.
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Poor air distribution.
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Adjust directional air louvers.
Adjust heater control to a warmer position.
Set pressurizer blower switch to a lower position.
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Inadequate air flow.
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Clogged air filters.
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Clean filters.
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Clogged air inlet screen.
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Clean screen.
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Heater core air flow restricted.
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Clean evaporator and housing with compressed air.
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Faulty blower fan motor.
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See your John Deere dealer.
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Defective blower fan switch.
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See your John Deere dealer.
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Loose wire connection.
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Tighten wire.
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Coolant leaking or dripping from heater core compartment.
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Loose hose clamp.
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Tighten clamp.
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Ruptured heater hose.
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Replace hose.
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Broken heater core tubes.
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Repair.
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Drip pan dirty (AC).
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Clean evaporator pan and outlet.
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Drain tube plugged (AC).
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Clean drain tube.
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Pressurizer fan, windshield wiper and/or compressor will not run.
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Defective motor.
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See your John Deere dealer.
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Defective switch.
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See your John Deere dealer.
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Faulty wiring or loose connections.
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Repair or replace wiring.
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| Symptom |
Problem |
Solution |
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Strange odors inside operator's cab.
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Dirty air filter.
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Clean filter.
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Evaporator condenser pan dirty.
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Clean pan and outlet.
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Drain tube is plugged.
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Clean drain tube.
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Tobacco smoke and tar on evaporator exterior.
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Clean filter.
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Partial frosting and sweating of lines combined with poor cooling.
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Compressor belt slipping.
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Check automatic belt tensioner.
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Replace belt and/or pulleys (if worn).
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Loss of refrigerant.
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(See your John Deere dealer.)
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Restricted or clogged liquid line.
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See your John Deere dealer.
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Expansion valve malfunctioning.
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See your John Deere dealer.
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Heater lines crossed.
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See your John Deere dealer.
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Ice flecks blowing from evaporator.
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Control dial set too low.
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Adjust the temperature control to a warmer position.
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Insufficient blower speed.
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Increase blower speed.
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| Symptom |
Problem |
Solution |
|
Failure to cool.
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Dirty air screen.
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Clean screen.
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|
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Dirty air filters.
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Clean filters.
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Debris on radiator core or rotary screen.
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Clean core or screen.
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Lint or dirt on condenser fins.
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Blow out condenser fins with compressed air.
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Insufficient refrigerant or extremely low.
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See your John Deere dealer.
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Loose compressor drive belt.
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Check automatic belt tensioner.
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Heater on.
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Turn heater off.
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Heater lines crossed.
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See your John Deere dealer.
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Compressor clutch not engaging.
|
Check wiring or see your John Deere dealer.
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Expansion valve not functioning.
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See your John Deere dealer.
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Restriction in refrigerant system.
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See your John Deere dealer.
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Loose wiring connector.
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Tighten wire.
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Defective temperature control switch.
|
See your John Deere dealer.
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Outside temperature too low (below 21°C) (70°F).
|
Wait until day gets warmer. If there is a malfunction in system, see your John Deere dealer.
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Condenser is overheating.
|
Clean condenser screens, cores and fins of condenser, oil cooler, and radiator.
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|
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Severe restriction in high side.
|
See your John Deere dealer.
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Burned out clutch field or faulty field.
|
See your John Deere dealer.
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|
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Short circuit in control circuit or failure of a switch in circuit.
|
See your John Deere dealer.
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| Symptom |
Problem |
Solution |
|
Hissing noise at expansion valve.
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Loss of refrigerant.
|
(See your John Deere dealer.)
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|
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Restriction in refrigerant system.
|
Check for kinks in hoses.
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Heater will not shut off.
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Heater hoses connected improperly. Defective heater control valve.
|
See your John Deere dealer.
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Heater will not heat.
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Air trapped in heater core.
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Bleed the heater.
|
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Defective thermostats in engine.
|
Replace the thermostats.
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Air conditioner turned on.
|
Shut off air conditioner.
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Defective heater control valve.
|
See your John Deere dealer.
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Shut-off valves closed at engine.
|
Open valves.
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Radio or CD does not function.
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Blown fuse.
|
Replace fuse.
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