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Drafts
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Poor air distribution.
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Adjust directional air louvers.
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Set pressurizer blower switch to "Med" or "LOW".
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Inadequate air flow.
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Clogged air inlet screen.
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Clean screen.
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Clogged air filters.
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Clean filters.
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Evaporator core air flow restricted.
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Clean evaporator and housing with compressed air.
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Loose wire connection.
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Tighten wire connection.
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Defective blower fan switch.
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See your John Deere dealer.
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Faulty blower fan motor.
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See your John Deere dealer.
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Water leaking or dripping from evaporator core compartment.
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Loose hose clamp.
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Tighten clamp.
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Drip pan dirty (AC).
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Clean evaporator pan and outlet with compressed air.
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Drain tubes plugged (AC).
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Clean drain tubes.
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Pressurizer fan, windshield wiper and/or compressor will not run.
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Faulty wiring or loose connections.
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Repair or replace wiring.
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Defective switch.
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See your John Deere dealer.
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Defective motor.
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See your John Deere dealer.
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Strange odors inside operator's cab.
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Dirty air filters.
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Clean filters.
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Tobacco smoke and tar on evaporator exterior.
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Clean filters.
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Evaporator condenser pan dirty.
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Clean pan and outlet with compressed air.
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|
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Drain tubes plugged.
|
Clean drain tubes.
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| Symptom |
Problem |
Solution |
|
Partial frosting and sweating of lines combined with poor cooling.
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Compressor belt slipping.
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Replace belt and/or tensioner.
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|
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Loss of refrigerant.
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Check sight glass for bubbles and system for leaks.
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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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|
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Expansion valve malfunctioning.
|
See your John Deere dealer.
|
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Ice flecks blowing from evaporator.
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Control dial set too low.
|
Adjust the temperature control to a warmer position.
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| Symptom |
Problem |
Solution |
|
Failure to cool.
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Outside temperature too low (below 70°F) (21°C).
|
Wait until day gets warmer. If there is a malfunction in system-see your John Deere dealer.
|
|
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Insufficient blower speed.
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Increase blower speed.
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Heater valve is open.
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Close heater valve on right-hand side of engine block.
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|
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Dirty air filters.
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Clean filters.
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|
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Dirty air screen.
|
Clean screen.
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Debris on radiator screen.
|
Clean screen.
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|
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Condenser is overheating.
|
Clean condenser screens, cores and fins of condenser and radiator.
|
|
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Lint or dirt on condenser fins.
|
Blow out condenser fins with compressed air.
|
|
|
Loose compressor drive belt.
|
Replace belt and/or tensioner.
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|
|
Loose wiring connector.
|
Tighten wiring connector.
|
|
|
Defective temperature control switch.
|
See your John Deere dealer.
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|
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Burned out clutch field or faulty field.
|
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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Clogged line strainer.
|
See your John Deere dealer.
|
|
|
Refrigerant is lost or extremely low.
|
See your John Deere dealer.
|
|
|
Severe restriction in high side.
|
See your John Deere dealer.
|
|
|
Restriction in refrigerant system.
|
See your John Deere dealer.
|
|
|
Expansion valve not functioning.
|
See your John Deere dealer.
|
|
|
Short circuit in control circuit or failure of a switch in circuit.
|
See your John Deere dealer.
|
| Symptom |
Problem |
Solution |
|
Hissing noise at expansion valve.
|
Loss of refrigerant.
|
Check sight glass for bubbles and system for leaks.
|
|
|
Restriction in refrigerant system.
|
Check for kinks in hoses.
|
|
|
|
Check receiver-dryer for uniformity of temperature. If temperature is not uniform, see your John Deere dealer.
|
|
Failure to heat.
|
Heater valve closed.
|
Open valve on right-hand side of engine block.
|
|
|
Dirty filter.
|
Clean filter. See CLEANING CAB FILTERS.
|
|
|
No thermostat in water outlet manifold.
|
Install thermostat. See your John Deere dealer.
|
|
|
Plugged heater core.
|
Flush cooling system.
|
|
|
Defective thermostat in water outlet manifold.
|
Replace thermostat. See your John Deere dealer.
|
|
|
Heater temperature control defective.
|
Replace control. See your John Deere dealer.
|
|
Cab heating system will not shut off.
|
Heater valve in "ON" position.
|
Shut off valve.
|
|
|
Heater hose connections reversed on engine.
|
Check hose connections. See your John Deere dealer.
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