BoilerFaultCodesTechnical description
Honeywell Control solenoid valve failed.
What causes this fault?
This fault occurs when the main gas control valve fails to open, preventing fuel from reaching the burner to create a flame. The most common reason is that the internal electrical coil has burnt out or the mechanical valve has become stuck due to age and wear. This acts as a safety shutdown to ensure gas does not flow when it cannot be safely ignited.
This failure is more frequent during the first cold snap of autumn, as the internal components can seize up after being inactive throughout the summer months.
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 →