How much does it cost to fix Johnson Starley error code E-01?

Typical repair cost for the Johnson Starley E-01 fault is £100-£350 including labour.

E-01 High

Johnson Starley E-01 Fault Code

Q: What does the Johnson Starley E-01 fault code mean?

Your boiler is failing to ignite, meaning it cannot create the flame needed to provide heating and hot water.

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 1 Johnson Starley model in our database.

Technical description: Heat generator does not light

Typical repair cost £100-£350 (including labour)

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.

J32 System ET Repair: £100-£350

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 27 April 2026