Off High
Your boiler's burner has detected light when it should be dark inside, causing it to shut down for safety.
Technical description: Eliminate the extraneous light
Typical repair cost: £90-180 (including labour)
DIY fix possible
Check that the burner cover and all casing panels are securely fitted and not letting in external light.Inspect the clear plastic viewing window for damage or missing seals.Press the reset button on the burner control box once all covers are tightened.
Protect yourself from future repair bills
A boiler cover plan would cover faults like Off — no call-out fees, no surprises.
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Parts commonly replaced
- Photocell (Flame Sensor)
- Control Box
- Burner Gaskets
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