B5.9G, B5.9LPG, B Gas Plus, B LPG Plus – Coolant Temperature Below Normal

Symptom Tree  

Coolant temperature gauge is malfunctioning

Test the temperature gauge. Repair or replace the gauge if necessary. Refer to the OEM service manual.

 

Engine is operating at low ambient temperature

Check the winterfront, shutters, and under-the-hood air. Use under-the-hood intake air in cold weather. Refer to Procedure 101-015 (Operating the Engine) in Section 1.

 

Fan drive or fan controls are malfunctioning

Check the fan drive and controls. Refer to the OEM service manual or a Cummins Authorized Repair Facility.

 

Thermostat is not correct or is malfunctioning

Check the thermostat for the correct part number and for correct operation. Refer to a Cummins Authorized Repair Facility.

 

Coolant flow through the radiator is not correct

Check for correct coolant flow through the radiator. Refer to the OEM service manual.

 
Contact a Cummins Authorized Repair Facility

Last Modified:  15-Feb-2005