F13 High

Johnson Starley F13 Fault Code

The Johnson Starley F13 fault code means: your boiler has stopped working because it has been locked out after a problem was detected and too many attempts were made to reset it remotely.. It appears on 6 Johnson Starley models 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: Remote reset lockout
Typical repair cost £90-250 (including labour)

DIY fix possible

Locate the main power switch for the boiler (usually a fused spur nearby).Turn the power off for 30 seconds.Turn the power back on and press the physical Reset button on the boiler control panel.

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Johnson Starley models that show the F13 fault code

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

Source

Johnson Starley F13 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