BoilerFaultCodesYour boiler has detected a communication issue with its internal gas control system and has shut down as a safety precaution.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Gas valve circuit error, try resetting the boiler
What causes this fault?
This fault occurs when the boiler's main computer loses the ability to safely regulate the flow of gas to the burner. It is typically caused by an electrical failure within the gas valve itself or a breakdown in the wiring that carries signals between the valve and the control board. For safety, the system instantly stops operating because it can no longer guarantee the correct amount of fuel is being delivered.
DIY fix possible
Locate the reset button or dial on the front control panelPress and hold the reset button for 5 secondsWait for the boiler to complete its restart sequence to see if the flame ignites
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 10-64 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Could it be time for a new boiler?
If repair costs are adding up, a new energy-efficient boiler could be the smarter long-term choice.
Affiliate links — we may earn a commission at no extra cost to you.