Troubleshooting - Air Conditioning and Heating System
Dust Enters the Cab
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| Dust Enters the Cab. | |
|---|---|
| Cause | Solution |
| There is a poor seal on the cab air filter element. | Check the condition of the seal. |
| The cab air filter is plugged. | Clean the cab air filter or replace the cab air filter. |
| The cab air filter is damaged. | Replace the cab air filter. |
| Air is leaking into the cab. | Seal air leaks. |
The Air Flow From the Fan is Low
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| The Air Flow From the Fan Is Low. | |
|---|---|
| Cause | Solution |
| The cab air filter is plugged or the recirculation filter is plugged. | Clean the filters or replace the filters. |
| The heater core is plugged or the evaporator core is plugged. | Clean the cores. |
The Air Conditioner Does Not Cool
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| The Air Conditioner Does Not Cool. | |
|---|---|
| Cause | Solution |
| The air flow through the air conditioner condenser is restricted. | Clean the radiator screen, the radiator, the oil cooler, and the air conditioner condenser. |
| The refrigerant is low. | Consult any Caterpillar dealer. (1) |
| The belt for the air conditioner compressor is slipping. | Check the belt tension. If the belt tension is low, adjust the belt tension. |
| The heater control is turned on. | Turn the temperature control counterclockwise for maximum cooling. |
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| ( 1 ) | Caterpillar dealers have the tools and the trained personnel for this service. |
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