High
360 V on Worcester Bosch 35 RSF

Your boiler’s internal computer chip is not communicating correctly with the main control board, meaning the system doesn't recognise its own settings.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Incompatible code plug – check if a correct code plug is installed and exchange or reconnect code plug

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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