ER 02 + RESET High

Johnson Starley ER 02 + RESET Fault Code

Also written as ER02RESET — same fault.

The Johnson Starley ER 02 + RESET fault code means: your boiler has overheated because it reached a temperature that is too high for safe operation.. It appears on 1 Johnson Starley model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: High limit stat open circuit
Typical repair cost £100-220 (including labour)

DIY fix possible

Wait at least 20 minutes for the unit to cool down completely.Ensure all radiator valves are open and there are no obstructions to airflow.Press the 'Reset' button on the control panel to see if the error clears.

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Johnson Starley models that show the ER 02 + RESET fault code

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

Source

Johnson Starley ER 02 + RESET 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