High
F0 on Worcester Bosch 30i Junior

Your boiler has experienced an internal electrical communication error, meaning the control board cannot talk to the parts that start the burner.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Internal error – electrical connector contacts or programmer interface module – check ignition leads are not loose.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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