BoilerFaultCodesTechnical description
Error with gas valve regulation
What causes this fault?
This fault occurs when the boiler's main control board loses the ability to send or receive signals from the gas valve. The most common reason is an internal electronic failure within the valve's solenoid or the circuit board, though loose or damaged wiring can also break this vital communication chain.
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 →