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Drafts.
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Poor air distribution.
|
Adjust directional air louvers.
Set pressurizer blower switch to "MED" or "LOW".
|
|
Inadequate air flow.
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Clogged air filters.
|
Replace filters.
|
|
|
Clogged air inlet screen.
|
Clean screen.
|
|
|
Evaporator core air flow restricted.
|
Clean evaporator and housing with compressed air.
|
|
|
Faulty blower fan motor.
|
See your John Deere dealer.
|
|
|
Defective blower fan switch.
|
See your John Deere dealer.
|
|
|
Loose wire connection.
|
Tighten wire.
|
|
Water leaking or dripping from evaporator core compartment.
|
Loose hose clamp.
|
Tighten clamp.
|
|
|
Drip pan dirty (AC).
|
Clean evaporator pan and outlet with compressed air.
|
|
|
Drain tubes plugged (AC).
|
Clean drain tubes.
|
|
Pressurizer fan, windshield wiper and/or compressor will not run.
|
Defective motor.
|
See your John Deere dealer.
|
|
|
Defective switch.
|
See your John Deere dealer.
|
|
|
Faulty wiring or loose connections.
|
Repair or replace wiring.
|
|
Strange odors inside operator's cab.
|
Dirty air filters.
|
Replace filters.
|
|
|
Evaporator condenser pan dirty.
|
Clean pan and outlet with compressed air.
|
|
|
Drain tubes plugged.
|
Clean drain tubes.
|
|
|
Tobacco smoke and tar on evaporator exterior.
|
Replace filters.
|
| Symptom |
Problem |
Solution |
|
Partial frosting and sweating of lines combined with poor cooling.
|
Compressor belt slipping.
|
Replace belt.
|
|
|
Loss of refrigerant.
|
Check sight glass for bubbles and system for leaks.
|
|
|
|
See your John Deere dealer.
|
|
|
Restricted or clogged line.
|
See your John Deere dealer.
|
|
|
Expansion valve malfunctioning.
|
See your John Deere dealer.
|
|
Ice flecks blowing from evaporator.
|
Control dial set too low.
|
Adjust the temperature control to a warmer position.
|
| Symptom |
Problem |
Solution |
|
Failure to cool.
|
Heater hoses installed backwards.
|
Install heater hoses correctly. (See your John Deere dealer.)
|
|
|
Insufficient blower speed.
|
Increase blower speed.
|
|
|
Dirty air screen.
|
Clean screen.
|
|
|
Dirty air filters.
|
Replace filters.
|
|
|
Debris on radiator screen.
|
Clean screen.
|
|
|
Lint or dirt on condenser fins.
|
Blow out condenser fins with compressed air.
|
|
|
Refrigerant is lost or extremely low (may have burned thermal fuse).
|
See your John Deere dealer.
|
|
|
Loose compressor drive belt.
|
Replace belt.
|
|
|
Compressor clutch not engaging.
|
Check wiring or see your John Deere dealer.
|
|
|
Expansion valve not functioning.
|
See your John Deere dealer.
|
|
|
Restriction in refrigerant system.
|
See your John Deere dealer.
|
|
|
Loose wiring connector.
|
Tighten wire.
|
|
|
Defective temperature control switch.
|
See your John Deere dealer.
|
|
|
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.
|
|
|
Clogged line strainer.
|
See your John Deere dealer.
|
|
|
Condenser is overheating.
|
Clean condenser screens, cores and fins of condenser and radiator.
|
|
|
Severe restriction in high side.
|
See your John Deere dealer.
|
|
|
Burned out clutch field or faulty field.
|
See your John Deere dealer.
|
| Symptom |
Problem |
Solution |
|
Cab pressure indicator reading at low end of indicator.
|
Cab blower switch turned off.
|
Turn switch on.
|
|
|
Door or window not latched.
|
Latch door or window.
|
|
|
Restricted air filter.
|
Replace with John Deere activated carbon cab air filter or appropriate substitute. (See CHECKING AND REPLACING CAB AIR FILTERS in Chassis section.)
|
|
|
Damaged door or window seals.
|
Replace damaged seals.
|
|
|
Loss of seal around control linkage, lines, wires, etc.
|
Seal any openings.
|
|
|
Problem cannot be identified and corrected.
|
See your John Deere dealer.
|
|
Cab pressure indicator reading at high end of indicator.
|
Damaged seal or pleated filter media on air filter.
|
Replace with John Deere activated carbon cab air filter or appropriate substitute. (See CHECKING AND REPLACING CAB AIR FILTERS in Chassis section.)
|
|
|
Missing or incorrect air filter.
|
Replace with John Deere activated carbon cab air filter or appropriate substitute. (See CHECKING AND REPLACING CAB AIR FILTERS in Chassis section.)
|
|
|
Air filter not seated properly.
|
Reseat or replace with John Deere activated carbon cab air filter or appropriate substitute. (See CHECKING AND REPLACING CAB AIR FILTERS in Chassis section.)
|
|
|
Problem cannot be identified and corrected.
|
See your John Deere dealer.
|