BoilerFaultCodesVokera LD1 Fault Code
The Vokera LD1 fault code means: your boiler has detected a lockout fault and has shut down to protect itself, meaning your heating and hot water will not work until it is reset.. It appears on 4 Vokera models in our database.
Technical description: Led alarm (red)
What causes the Vokera LD1 fault?
This fault occurs when the boiler fails to detect a flame after several ignition attempts, causing the system to shut down for safety. The most common reasons are a lack of gas supply to the unit, a blocked burner, or a faulty sensor that cannot confirm the flame is lit. It can also be caused by worn-out electrical components that are responsible for creating the initial spark.
DIY fix possible
Locate the mode selector switch on the front panelTurn the switch to the 'OFF/RESET' positionWait for 5-10 secondsTurn the switch back to either 'Hot Water Only' or 'Heating and Hot Water'
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Gas Safe Register →Vokera models that show the LD1 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Vokera LD1 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