DD15 Troubleshooting – Section 11.6 Inoperative Thermo-Modulated Fan

Section 11.6
Inoperative Thermo-Modulated Fan

Check as follows:‪

1. Test the thermo-modulated fan; refer to OEM guidelines.
2. If the thermo-modulated fan is functioning correctly, check thermostats; refer to "11.7 Faulty Thermostat" .
3. If the thermo-modulated fan is not functioning correctly, replace inoperative thermo-modulated fan; refer to OEM guidelines.

   ENGINE EXHAUST ‪
   To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

4. Start and run the engine.
5. Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
   1. If the engine coolant temperature is 85-95°C (185-203°F), no further troubleshooting is required. Shut down the engine.
   2. If the engine coolant temperature is above 85-95°C (185-203°F), shut down the engine. Check thermostats; refer to "11.7 Faulty Thermostat" .