How much does it cost to fix Johnson Starley error code ER 14?

Typical repair cost for the Johnson Starley ER 14 fault is £150-300 including labour.

ER 14 High

Johnson Starley ER 14 Fault Code

Q: What does the Johnson Starley ER 14 fault code mean?

Your boiler has detected that it is running much too hot and has automatically shut itself down to prevent any damage or safety issues.

Also written as ER14 — same fault.

The Johnson Starley ER 14 fault code means: your boiler has detected that it is running much too hot and has automatically shut itself down to prevent any damage or safety issues.. It appears on 1 Johnson Starley model in our database.

Technical description: Over-heat (>105ºC)

Typical repair cost £150-300 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Johnson Starley models that show the ER 14 fault code

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

Warmcair DW Repair: £150-300

Source

Johnson Starley ER 14 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 Warmcair DW manual (PDF)

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026