E09 High
Your boiler has detected an issue with the internal gas valve's electronic signal, meaning it cannot safely control the fuel flow and has shut down as a precaution.
Technical description: Valve feed back error
Typical repair cost: £180-£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.
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Parts commonly replaced
- Gas Valve
- Wiring Harness
- Main Control Board (PCB)
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