Technical description
Internal boiler control board error / Reset button pressed too many times
What causes this fault?
This fault occurs when the boiler's internal computer registers too many reset attempts within a five-minute window, causing it to freeze for luxury and safety reasons. It is usually triggered by a homeowner trying to clear a different, underlying fault code repeatedly without fixing the actual problem. The boiler essentially enters a 'timed lockout' to protect the electronic components from further interference.
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.