What does the Johnson Starley 45 fault code mean?

Your boiler has detected an electrical fault with the internal sensor that monitors exhaust gases, causing it to shut down for safety.

How much does it cost to fix Johnson Starley error code 45?

Typical repair cost for the Johnson Starley 45 fault is £120-220 including labour.

Flue gas temperature sensor short circuit. Short circuit in wiring between sensor and control board

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

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.