Low
Fd on Worcester Bosch CDi Highflow

You have accidentally pressed the reset button on your boiler, which has simply interrupted its normal startup cycle.

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

Reset button pressed by mistake

Shared across the CDi Highflow 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

Turn the boiler off at the fused spur or mains switchWait for 30 seconds for the internal electronics to fully power downSwitch the power back on and allow the boiler to restart normally

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All 23 fault codes on the CDi Highflow

Seeing a different code? Every code this model can display, in one place.

A1A5A7A8B1b2b3b4b5b6b7C6D3D5D6E2E9EAF0F1F7FA

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