BoilerFaultCodesJohnson Starley E01 Fault Code
The Johnson Starley E01 fault code means: your boiler has tried to light several times but has been unable to create a flame, meaning you will not have any heating or hot water.. It appears on 4 Johnson Starley models in our database.
Technical description: Ignition failure
DIY fix possible
Check if other gas appliances in your home, such as a gas hob, are working correctly to ensure gas is reaching the property.Verify that your gas pre-payment meter (if applicable) has sufficient credit.Try resetting the boiler by following the instructions in your user manual to clear the fault.
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Johnson Starley models that show the E01 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Johnson Starley E01 fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.
- Johnson Starley Aquair S manual (PDF)
- Johnson Starley Aquair S 25 manual (PDF)
- Johnson Starley J32 System ET manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026