High
250 on Worcester Bosch 1000

Your boiler's computer has encountered an internal error and needs a reset or a service technician to investigate the control system.

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

Default software error

What causes this fault?

Software malfunction

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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