L2 High
Your boiler has lit correctly but the flame has gone out unexpectedly, often due to a fuel supply issue or a blockage in the condensate pipe.
Technical description: Flame loss
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check that your gas emergency control valve is open and you have credit on your meter.Check if the condensate discharge pipe (the plastic pipe leading outside) is frozen or blocked.Reset the boiler by pressing the 'Restart' button.
Protect yourself from future repair bills
A boiler cover plan would cover faults like L2 — no call-out fees, no surprises.
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Parts commonly replaced
- Flame sensing electrode
- Gas valve
- Spark generator
- Condensate trap
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