BoilerFaultCodesYour boiler is having trouble managing the flame and electrical signals, which is preventing it from heating your home safely.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flame circuit error – possible control box fault
What causes this fault?
This fault occurs when the boiler's internal computer is unable to correctly process the electrical signals required to monitor the flame. It is usually caused by a communication failure between the sensing hardware and the main control board, meaning the boiler shuts down because it cannot verify that it is burning gas safely. In many cases, this is due to moisture on the electronics or a component failure within the circuit board itself.
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 E08 — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Keston C36 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.