F2, FN or LN High
Your boiler has lit correctly but the flame has gone out unexpectedly, meaning the system has shut down for safety.
Technical description: Flame loss
Typical repair cost: £100-350 (including labour)
DIY fix possible
Check if other gas appliances, like a cooker, are working to ensure gas is reaching the propertyCheck if your gas meter has credit (if using a prepay meter)Press the Reset button on the front of the boiler
Protect yourself from future repair bills
A boiler cover plan would cover faults like F2, FN or LN — no call-out fees, no surprises.
*Affiliate links — we may earn a commission at no extra cost to you. Prices shown are starting prices.
Parts commonly replaced
- Flame sensing electrode
- Gas valve
- Ignition lead
- Printed Circuit Board (PCB)
*Affiliate links — we may earn a commission at no extra cost to you.