how to fix thermo king code 18 repair?

Have you ever encountered a Thermo King Code 18 error while operating your refrigeration unit? This puzzling error can indicate a high engine coolant temperature, which can lead to engine overheating and potential damage. But fear not, as we are here to guide you through the troubleshooting process and help you resolve this issue effectively. So, let’s dive in and find out how to fix Thermo King Code 18 and get your unit back up and running smoothly.

Key Takeaways:

• Thermo King Code 18 indicates high engine coolant temperature.
• Troubleshooting involves checking the coolant temperature sensor, coolant supply, and air in the coolant lines.
• Inspecting the thermostat, water pump, radiator, evaporator fan, and engine oil level can provide valuable insights.
• Follow a systematic approach to identify and address the potential causes of Code 18 error.
• Consult the Thermo King manual or seek professional assistance if needed.

Troubleshooting Thermo King Code 18

When it comes to resolving the Thermo King Code 18 error, a systematic troubleshooting approach can help pinpoint the underlying issues. Here’s a step-by-step guide to diagnosing and fixing the problem:

1. Check the coolant temperature reading: Start by examining the WT-1 and WT-2 readings. Ensure that they fall within the recommended range of 120-150°F. Rapid fluctuations in temperature could indicate a malfunctioning sensor or other issues.
2. Inspect the coolant supply: Drain the coolant and look for any signs of air in the lines. Air pockets can disrupt proper cooling and contribute to the code 18 error. If air is present, purge the system to restore optimal coolant flow.
3. Verify the thermostat’s functionality: A faulty thermostat can cause irregular temperature readings and disrupt the engine’s cooling mechanism. Test the thermostat and replace it if necessary.
4. Check the water pump: A malfunctioning water pump can impede the circulation of coolant, leading to overheating. Inspect the water pump for any signs of damage or wear and replace it if needed.
5. Pressure wash the radiator: Dirt and debris buildup on the radiator can obstruct airflow and hinder proper cooling. Use a pressure washer to remove any obstructions and restore efficient heat dissipation.
6. Ensure the evaporator fan is functional: A malfunctioning fan can lead to inadequate airflow and cooling, exacerbating the code 18 issue. Check the fan’s operation and replace it if necessary.
7. Monitor the engine oil level: Low oil levels or signs of oil leakage can indicate additional problems that may contribute to the code 18 error. Regularly check the oil level and address any leaks or abnormalities.

By following these troubleshooting steps, you can diagnose and repair the Thermo King Code 18 error and prevent further issues. However, if the problem persists after attempting these fixes, it’s advisable to consult the Thermo King manual or seek professional assistance.

Resolving Thermo King Code 18

To resolve the Thermo King code 18 error, we recommend following the steps below:

1. First, ensure that the coolant temperature sensor is working correctly by checking the readings. If the readings are inaccurate or inconsistent, it may be necessary to replace the sensor.
2. Next, address any issues with the coolant supply. Check the coolant level and inspect for any leaks or obstructions in the coolant lines. Addressing these issues can help prevent overheating and the code 18 error.
3. Check the thermostat for proper functioning. If the thermostat is faulty or not opening and closing as it should, it may need to be cleaned or replaced. A malfunctioning thermostat can lead to improper coolant flow and contribute to the code 18 error.
4. Inspect the water pump for any signs of malfunction. The water pump plays a crucial role in circulating coolant throughout the system, and a malfunctioning pump can lead to inadequate cooling. If necessary, replace the water pump to resolve the code 18 error.
5. If all the previous steps have been taken and the code 18 error persists, consider pressure washing the radiator. Over time, dirt and debris can accumulate on the radiator fins, obstructing airflow. Pressure washing the radiator can help improve cooling efficiency and resolve the code 18 error.
6. Finally, check the evaporator fan, engine oil level, and main coolant tank pressure for any abnormalities. A malfunctioning fan, low engine oil level, or abnormal coolant tank pressure can all contribute to the code 18 error. Address any issues found during the inspection to effectively resolve the error.

By following these steps, you can effectively diagnose and resolve the Thermo King code 18 error. Remember to consult the Thermo King manual or seek professional assistance if needed.

Conclusion

The Thermo King code 18 error can be a challenging issue to resolve, but with a systematic troubleshooting approach, it can be fixed. By thoroughly checking the coolant temperature, supply, and air in the coolant lines, as well as inspecting critical components like the thermostat, water pump, radiator, evaporator fan, and engine oil level, you can identify potential causes and take the necessary steps to address them.

Remember, it’s essential to consult the Thermo King manual for specific guidance and instructions. If you’re unsure or uncomfortable with the troubleshooting process, don’t hesitate to seek professional assistance. The expertise of a qualified technician can save you time and ensure that the code 18 error is properly diagnosed and repaired.

By following these troubleshooting tips and taking proactive measures, you can get your Thermo King unit back on track. Regular maintenance and scheduled inspections are crucial for preventing future issues and optimizing the performance of your Thermo King system. Take care of your equipment, and it will continue to serve you reliably in the long run.

Source Links

• https://www.thermoking.com/na/en/alarm-codes.html
• https://thermokingmichigan.com/common-error-codes/
• https://thebooq.com/articles/tripac-evolution-code-18.-high-engine-coolant-temperature