EC 256 — Burner control unit has an error

What does EC 256 mean?

The burner control unit has detected an error. This unit is critical for safe ignition and supervision of the boiler's flame.

• Defective burner control unit.
• Internal fault within the control unit.
• Electrical supply issue to the control unit.

Click steps to track your progress.

1. 1

   Reset the boiler by power cycling it at the mains for 30 seconds and then turning it back on.

2. 2

   Check the boiler's display for any additional information or messages.

3. 3

   If the error persists, contact a Gas Safe registered engineer, as the burner control unit may require professional diagnosis or replacement.