High
362 on Worcester Bosch Greenstar 28CDi

Your boiler's computer is having trouble recognising its own internal settings and requires a professional to reset or replace the electronic control unit.

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

Boiler identification module or boiler electronics faulty

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.

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful