Ignition Lockout
The boiler has locked out after failing to ignite or losing its flame. A persistent version of the F2 fault requiring a manual reset.
L2 in winter is most commonly a frozen condensate pipe. Locate the white plastic pipe on the outside wall and gently pour warm water along it.
Step-by-Step Fix Guide
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Step 1
Check gas supply (other gas appliances should work)
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Step 2
In cold weather, check the condensate pipe for frost and thaw with warm water
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Step 3
Press the RESTART button (flame symbol) and hold for 2–3 seconds
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Step 4
If the boiler doesn't start, wait 5 minutes and try once more
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Step 5
If L2 persists after two resets, call a Gas Safe engineer
Work on gas appliances must be carried out by a Gas Safe registered engineer. The steps above cover safe checks a homeowner can perform - any internal component replacement requires a qualified professional. If in doubt, always call an engineer.