BoilerFaultCodesJohnson Starley E-01 Fault Code
Also written as E01 — same fault.
The Johnson Starley E-01 fault code means: your boiler is failing to ignite, meaning it cannot create the flame needed to provide heating and hot water.. It appears on 2 Johnson Starley models in our database.
Technical description: Heat generator does not light
DIY fix possible
Check if your gas supply is active by testing another gas appliance like a hob.Ensure your gas prepayment meter has sufficient credit.Press the Reset button on the control panel to see if the boiler restarts.
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Johnson Starley models that show the E-01 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Johnson Starley E-01 fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026