Low
i02 on Worcester Bosch Greenstar 12i System

This code is simply a historical record of the last issue your boiler experienced and does not indicate an active, current fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Last error: This can be viewed during normal operation. Displays the last diagnostic code with boiler status code.

Engineer required

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

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