New Holland 3007 – Engine Control Module (ECM/ECU): Coolant Temperature Exceeds Upper Limit

The engine's coolant temperature has surpassed its predefined upper limit (over 112°C / 234°F), signaling a critical overheating condition. This fault is logged by the Engine Control Module (ECM) and indicates the cooling system's inability to adequately dissipate heat. It will likely trigger a red dashboard warning light and may cause the engine to derate or shut down to prevent catastrophic engine damage.

• T5
• T6
• T7
• T6.120
• T6.180
• T7.165
• T7.270
• CX Series Combine
• CR Series Combine
• Machines with FPT NEF and Cursor engines

1. 1

   Check coolant level in the reservoir (most common cause of overheating) and top up with manufacturer-recommended coolant if low

2. 2

   Inspect the radiator and cooling pack for buildup of dust, dirt, or crop residue that could obstruct airflow

3. 3

   Inspect all radiator and cooling system hoses for cracks, leaks, or deterioration

4. 4

   Check the fan belt for proper condition and tension to ensure it is driving the water pump and fan correctly

5. 5

   Look for any signs of coolant leakage from the radiator, hoses, water pump, or engine block

6. 6

   Verify sensor and wiring (erroneous signal cause): Use a diagnostic tool to monitor real-time coolant temperature readings for plausibility, and check the sensor wiring/connector for damage or corrosion

7. 7

   Test the thermostat (stuck closed cause): Remove and place in a pan of hot water to verify it opens at the correct temperature

8. 8

   Inspect the water pump (circulation failure cause): Check for coolant leaks from the pump, squealing/grinding noises, or a wobbling pulley

1. 1

   If the Coolant Temperature Sensor is faulty

   Allow the engine to cool completely and relieve any pressure in the cooling system.

2. 2

   If the Coolant Temperature Sensor is faulty

   Locate the sensor, which is typically threaded into the cylinder head or thermostat housing.

3. 3

   If the Coolant Temperature Sensor is faulty

   Place a drain pan under the sensor to catch any spilled coolant.

4. 4

   If the Coolant Temperature Sensor is faulty

   Disconnect the electrical connector and unscrew the old sensor.

5. 5

   If the Coolant Temperature Sensor is faulty

   Clean the threads in the mounting boss.

6. 6

   If the Coolant Temperature Sensor is faulty

   Apply a suitable thread sealant to the new sensor and install it.

7. 7

   If the Coolant Temperature Sensor is faulty

   Reconnect the electrical connector and top off the coolant level.

8. 8

   If the Thermostat is faulty

   Drain the cooling system into a clean container.

9. 9

   If the Thermostat is faulty

   Locate the thermostat housing, usually where the upper radiator hose connects to the engine.

10. 10

    If the Thermostat is faulty

    Remove the bolts securing the housing cover.

11. 11

    If the Thermostat is faulty

    Remove the old thermostat and gasket.

12. 12

    If the Thermostat is faulty

    Clean the mating surfaces of the housing and cover.

13. 13

    If the Thermostat is faulty

    Install the new thermostat and gasket, ensuring it is oriented correctly.

14. 14

    If the Thermostat is faulty

    Reinstall the housing cover and tighten the bolts to the specified torque.

15. 15

    If the Thermostat is faulty

    Refill the cooling system with the correct coolant.

16. 16

    If the Water Pump is faulty

    Completely drain the cooling system.

17. 17

    If the Water Pump is faulty

    Loosen the pulley to relieve tension and remove the fan belt from the water pump pulley.

18. 18

    If the Water Pump is faulty

    Remove the fan and pulley if necessary.

19. 19

    If the Water Pump is faulty

    Disconnect any hoses attached to the water pump.

20. 20

    If the Water Pump is faulty

    Remove the mounting bolts and gently pry the old pump away from the engine block. A rubber mallet may be needed to break the seal.

21. 21

    If the Water Pump is faulty

    Thoroughly clean all old gasket material from the engine block's mating surface.

22. 22

    If the Water Pump is faulty

    Apply a thin layer of gasket sealant to the new gasket and position it on the new pump or engine block.

23. 23

    If the Water Pump is faulty

    Install the new water pump, tightening the bolts gradually and evenly in a staggered sequence to the manufacturer's specifications.

24. 24

    If the Water Pump is faulty

    Reinstall all other components in the reverse order of removal.

25. 25

    If the Water Pump is faulty

    Refill the cooling system, run the engine to normal operating temperature, and check for leaks.