26 High
Your boiler is struggling to keep a flame lit and has safely shut down after several failed attempts to stay running.
Technical description: Flame signal lost 5 times in 4 minutes
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 26 — no call-out fees, no surprises.
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Parts commonly replaced
- Flame sensing electrode
- Gas valve
- Ignition lead
- Burner
*Affiliate links — we may earn a commission at no extra cost to you.