Low
226 on Worcester Bosch Greenstar 30i

Your boiler has recorded that a physical diagnostic tool was plugged into it to view the internal error history.

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.

What the manual says

Manufacturer manual

Service tool has been connected in the blocking error history menu

Shared across the 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.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Press and hold the reset button for five secondsMonitor the display to see if the code clearsIf the code persists, contact a Gas Safe engineer to check the control board

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