Troubleshooting and Fixing Fault Code F85 "Temperature Sensor Fault"

on your Glow-Worm EasiCom Boiler

Temperature sensors play a critical role in monitoring the temperature of various components in a boiler. If you encounter an F85 fault code on your Glow-Worm EasiCom Boiler, it indicates a problem with one or more of the temperature sensors. In this blog post, we will explore the details of this fault, identify warning signs, provide troubleshooting tips, and guide homeowners and engineers on how to effectively resolve the issue.

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Understanding the Temperature Sensor

The F85 fault code on the Glow-Worm EasiCom Boiler indicates an issue with one or more temperature sensors within the boiler. These sensors are responsible for measuring and monitoring the temperature of various components, such as the water, flue gases, or other critical areas. When a fault is detected in any of the temperature sensors, the boiler triggers the F85 fault code as a safety precaution.

F85 Red Flags!

If you suspect an F85 fault on your Glow-Worm EasiCom Boiler, watch out for the following warning signs:

  1. Displayed error code: The boiler’s display shows the F85 fault code or an associated error message.
  2. Inaccurate temperature readings: The displayed temperature on the boiler may be incorrect or inconsistent with the actual temperature of the relevant component.
  3. Fluctuating heating performance: You may notice that the heating system is not operating consistently, with temperature fluctuations or an inability to reach the desired heat levels.
  4. Loss of heating: The boiler fails to provide heat to the heating system, leaving your home without adequate warmth.
  5. Error code display on external control: If your system includes an external control unit, it may also display an error code related to the temperature sensor fault.

Check out what your allowed to do:

Troubleshooting Tips:

If you encounter an F85 fault on your Glow-Worm EasiCom Boiler, try the following troubleshooting tips before seeking professional assistance:

  1. Check sensor wiring connections: Inspect the wiring connections for the temperature sensors. Ensure they are securely connected to the appropriate components and undamaged. Tighten any loose connections if found.
  2. Clean the sensors: Gently clean the temperature sensors using a soft cloth or brush. Remove any dirt, debris, or build-up that may be affecting their accuracy. Avoid using excessive force or abrasive materials.
  3. Verify sensor placement: Check the positioning of the temperature sensors. Ensure they are properly installed and in contact with the relevant components for accurate temperature measurement. Confirm that they are not obstructed by any objects or debris.
  4. Test the sensors’ functionality: Use a multimeter or follow the manufacturer’s instructions to test the functionality of the temperature sensors. Compare the readings with the desired temperature settings. If a sensor is faulty, it may need to be replaced.
  5. Contact customer support or a qualified engineer: Reach out to Glow-Worm’s customer support or a qualified engineer for further guidance. They can help over the phone or via email and may have additional troubleshooting steps specific to your boiler model and the F85 fault.

What can you do as a Homeowner?

As a homeowner, you can take the following steps to address the F85 fault on your Glow-Worm EasiCom Boiler:

  1. Perform basic troubleshooting: Follow the troubleshooting tips mentioned above to see if you can resolve the issue independently. Check the sensor wiring connections, clean the sensors, verify sensor placement, test the sensors’ functionality, and contact customer support or a qualified engineer for assistance.
  2. Reset the boiler: As the homeowner, try turning the boiler off for around 1-2 minutes and then turn it back on again. If the error code still appears, you will have to contact an engineer. 
  3. Schedule a service visit: If the issue persists or you are unable to resolve it on your own, consider scheduling a service visit with a qualified engineer. They can diagnose the problem accurately and implement the necessary repairs or replacements of the temperature sensors or associated components.
  4. Check warranty coverage: Review your warranty documentation or contact Glow-Worm customer support to determine if the F85 fault is covered. If it is covered, the manufacturer may arrange for a technician to address the issue at no cost to you.
  5. Regular maintenance: After resolving the F85 fault, consider scheduling regular maintenance for your boiler. Routine servicing helps prevent future issues and ensures the optimal performance of your heating system.

What to do as a Qualified Gas Engineer?

As an engineer, follow these steps to diagnose and resolve the F85 fault on the Glow-Worm EasiCom Boiler:

  1. Inspect the sensor wiring connections: Verify the wiring connections for the temperature sensors. Ensure they are securely connected to the appropriate components and undamaged. Repair or replace any damaged or faulty wiring.
  2. Clean the sensors: Gently clean the temperature sensors using a soft cloth or brush. Remove any dirt, debris, or build-up that may affect their accuracy. Avoid using excessive force or abrasive materials.
  3. Test the sensors’ functionality: Use a multimeter or follow the manufacturer’s instructions to test the temperature sensors. Compare the readings with the desired temperature settings. If a sensor is faulty or providing inaccurate readings, replace it with a new sensor.
  4. Verify sensor placement: Check the positioning of the temperature sensors. Ensure they are properly installed and in contact with the relevant components for accurate temperature measurement. Confirm that they are not obstructed by any objects or debris.
  5. System evaluation and testing: Conduct a comprehensive evaluation of the heating system to ensure there are no additional issues affecting temperature measurement. Test the boiler’s operation, including the relevant components, to confirm accurate temperature readings and proper functionality.

FAQ's

It is not recommended to continue using the boiler with the F85 fault, as inaccurate temperature measurements can lead to inefficient heating performance and potential system damage. It is best to address the issue promptly.

The time required to resolve the F85 fault depends on the underlying cause and the expertise of the engineer. In most cases, it can be resolved during a single service visit.

Warranty coverage varies depending on the manufacturer and the specific terms of your warranty agreement. Check the warranty documentation provided by Glow-Worm or consult customer support to determine if the F85 fault is covered.

Conclusion

Remember, if you are unsure about any troubleshooting steps or lack the necessary expertise, it is always advisable to consult a professional engineer or contact customer support for assistance.

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