F.20 — Boiler Overheating (Feed Temperature Sensor) (Turbomax Plus)

What does F.20 mean?

Your Turbomax Plus boiler has reached an dangerously high temperature, likely detected by the feed temperature sensor. The system has automatically shut down to prevent damage and requires cooling.

• Boiler exceeded maximum temperature
• Feed temperature sensor fault leading to overheating indication

Click steps to track your progress.

1. 1

   Turn off the boiler and allow it to cool down completely for at least an hour.

2. 2

   Check that all radiator valves are open and that there are no blockages in your heating system.

3. 3

   Ensure the boiler has proper ventilation and is not obstructed.

4. 4

   If the problem reoccurs, contact a qualified heating engineer to inspect the temperature sensors and overall system.