Cummins N14 STC, Celect, Celect Plus – Service Manual Coolant Temperature Below Normal

Symptom Tree  t024

This is symptom tree
Cause Correction

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084, for fault code troubleshooting.

 

Engine is operating at low ambient temperature

Check the shutters and engine compartment air. Refer to the OEM service manual.

 

Coolant temperature gauge is malfunctioning

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

 

Coolant temperature sensor is malfunctioning

Use an electronic service tool to check the coolant temperature sensor circuit. Refer to Procedure 008-026, Procedure 008-027, or Procedure 008-028 in Section 8 and the OEM service manual.

 

Radiator shutters are stuck open or opening early

Check the shutter operation. Repair or replace the shutters if necessary. Refer to Procedure 008-049 in Section 8.

 

Radiator swing check valve is malfunctioning (if equipped)

Check the swing check valve for correct operation. Refer to the OEM service manual.

 

Fan drive or fan controls are malfunctioning

Check the fan drive and controls. Refer to Procedure 008-026 in Section 8.

 

Thermostat is not correct or is malfunctioning

Check the thermostat for the correct part number and for correct operation. Refer to Procedure 008-013 in Section 8.

 

Thermostat seal is damaged, missing, or not installed correctly.

Check the thermostat seal for damage and correct installation. Refer to Procedure 008-016 in Section 8.

 

Coolant flow through the radiator is not correct

Check for correct coolant flow through the radiator. Refer to Procedure 008-042 in Section 8.

 
Last Modified:  22-Dec-2011