i6 Low

Worcester Bosch i6 Fault Code

Also written as I6 — same fault.

The Worcester Bosch i6 fault code means: your boiler is simply displaying the current speed at which the hot water is flowing through your taps, rather than indicating a fault.. It appears on 1 Worcester Bosch model in our database.

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: DHW flow rate - The screen displays the current DHW flow rate in 0.1l/m units.

DIY fix possible

Press the 'Reset' button or the 'Menu' button to return the screen to the standard operating displayMonitor if the display persists after closing all hot water tapsIf the boiler is otherwise working normally, no further action is required

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Worcester Bosch models that show the i6 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Worcester Bosch i6 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026