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

Typical repair cost for the Johnson Starley Error 01 fault is £120-350 including labour.

Error 01 High

Johnson Starley Error 01 Fault Code

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

Your heater is trying to turn on but cannot light the burner, meaning your heating will not work until the system is reset or repaired.

Also written as ERROR01 — same fault.

The Johnson Starley Error 01 fault code means: your heater is trying to turn on but cannot light the burner, meaning your heating will not work until the system is reset or repaired.. It appears on 1 Johnson Starley model in our database.

Technical description: Burner fails to ignite within 4 minutes (requires RESET)

Typical repair cost £120-350 (including labour)

DIY fix possible

Check that your gas meter has credit and the isolation valve is openEnsure other gas appliances in the home are workingPress and hold the 'RESET' button on the control panel for 3 seconds

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Johnson Starley models that show the Error 01 fault code

Click a model for the full fault code list and model-specific repair notes.

Warmcair DW Repair: £120-350

Source

Johnson Starley Error 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