F7 228 High
Your boiler detects a flame when there shouldn't be one, so it has shut down as a safety precaution to prevent gas from flowing incorrectly.
Technical description: Isioniation current detected before burner start
Typical repair cost: £120-300 (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 F7 228 — no call-out fees, no surprises.
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Parts commonly replaced
- Ionisation electrode
- Control box (PCB)
- Gas valve
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