BoilerFaultCodesVokera L1 Fault Code
The Vokera L1 fault code means: your boiler is currently waiting for a demand for heating or hot water and is not experiencing a fault.. It appears on 4 Vokera models in our database.
Technical description: Led OK (green)
What causes the Vokera L1 fault?
This status occurs because the boiler is in its normal standby mode, having successfully reached the required temperature or completed its previous task. It is simply waiting for your thermostat to click on or for a hot water tap to be opened before it starts firing again. There is no physical fault or blockage preventing the system from working.
This code is more visible during summer months when your central heating is turned off and the boiler spends most of the day in standby mode.
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperatureEnsure your programmer or heating timer is switched to an 'On' periodVerify that the boiler selector switch is set to the correct mode for heating or hot water
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Gas Safe Register →Vokera models that show the L1 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera L1 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026