ER 14 + SPANNER High

Johnson Starley ER 14 + SPANNER Fault Code

Also written as ER14SPANNER — same fault.

The Johnson Starley ER 14 + SPANNER fault code means: your boiler has shut down because it detected a sudden, unsafe rise in temperature, likely caused by water not flowing through the system correctly.. 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: Over-heat (temp increase of >2º/s)
Typical repair cost £120-350 (including labour)

DIY fix possible

Check that your home's thermostat is turned down and the boiler is off.Ensure all radiator valves are fully open to allow water to circulate.Check that the system pressure is at the correct level (usually between 1 and 1.5 bar).Once cooled, press the reset button on the boiler control panel.

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Johnson Starley models that show the ER 14 + SPANNER fault code

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

Source

Johnson Starley ER 14 + SPANNER 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