12-68 High
Your boiler has failed to correctly detect its own flame during start-up, likely due to a minor sensor reading inconsistency.
Technical description: Ion base value differs from the previous value – try resetting the boiler
Typical repair cost: £90-220 (including labour)
DIY fix possible
Locate the Power/Reset button on the front control panelPress and hold the Reset button for 2-3 secondsWait up to 5 minutes for the boiler to complete its restart sequence
Protect yourself from future repair bills
A boiler cover plan would cover faults like 12-68 — no call-out fees, no surprises.
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Parts commonly replaced
- Ionisation electrode
- Ignition cable
- Burner gasket
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