What does the Johnson Starley F-15 fault code mean?

Your boiler has attempted to restart itself too many times in a short period and has now locked itself out for safety reasons.

How much does it cost to fix Johnson Starley error code F-15?

Typical repair cost for the Johnson Starley F-15 fault is £120-£250 including labour.

Manufacturer manual

Reset occurs 5 times within 15 minutes

Shared across the Quantec range

This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Boiler cover options

A cover plan would handle faults like F-15: no call-out fees, no surprise bills.

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Seeing a different code? Every code this model can display, in one place.

Lockout fault with a reset-needed pattern.

Older boilers: thermocouple, draught or gas supply.

7 signs repair isn't worth it anymore.