E09 High
Your boiler has lost its electrical connection to the gas supply unit, meaning it cannot ignite to provide heating or hot water.
Technical description: Gas valve connection error
Typical repair cost: £120-£350 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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. Prices shown are starting prices.
Parts commonly replaced
- Gas valve
- Wiring harness
- Printed Circuit Board (PCB)
*Affiliate links — we may earn a commission at no extra cost to you.