F0 238 — Gas valve or control box error

What does F0 238 mean?

The boiler has detected an error with the gas valve or the control box. This could mean the gas valve coils need checking or there's a problem with the burner control unit (KIM).

• Faulty gas valve coils.
• Defective control box or burner control unit (KIM).
• Wiring issues to the gas valve or control box.

Click steps to track your progress.

1. 1

   Ensure your gas supply is turned on and other gas appliances are working.

2. 2

   Reset the boiler by pressing the reset button on the control panel.

3. 3

   Contact a Gas Safe registered engineer, as this fault relates to critical gas and control components.