F0 — Internal error (electrical/programmer/ignition)

What does F0 mean?

An internal error has occurred, potentially related to electrical connector contacts, the programmer interface module, or loose ignition leads. This indicates a general malfunction within the boiler's electronics.

• Loose or dirty electrical connector contacts.
• Faulty programmer interface module.
• Loose ignition leads.
• General control board malfunction.

Click steps to track your progress.

1. 1

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

2. 2

   Check for any visible loose connections to the boiler's programmer or ignition leads.

3. 3

   If the error persists, contact a Gas Safe registered engineer to diagnose the internal electrical components.