High
115 on Worcester Bosch Greenstar 12i System

Your boiler has identified an internal configuration mismatch, as the internal chip installed is designed for a different type of heating system than the one you are currently using.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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

Code plug for 24i System LPG

Engineer required

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

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