BoilerFaultCodesYour boiler has detected an electrical issue with the component that controls the gas supply, causing the system to shut down for safety.
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 control circuit fault
What causes this fault?
This fault occurs when the boiler's main control board loses communication with the gas valve or detects an incorrect electrical signal between them. The most common reason is a component failure within the gas valve itself or a fault on the printed circuit board that prevents it from safely managing the fuel supply.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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 E09 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Potterton Powermax HE is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.