High
POINT G on Worcester Bosch Highflow 300

Your boiler has switched itself off because the internal fan that clears exhaust gases has stopped working.

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.

What the manual says

Manufacturer manual

Internal fan does not run. Replace fan.

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.

What causes this fault?

This fault occurs when the boiler's control board sends power to the fan but does not receive any movement in return. The most common reason is that the fan motor has burnt out or seized up due to age, preventing it from clearing combustion gases so the boiler can safely fire up.

This fault often appears during the first cold spell of autumn when the fan, having sat idle over the summer, fails to spin up due to seized bearings.

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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Related fault codes

C1View →C6View →A8View →

All 57 fault codes on the Highflow 300

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

6A6C6d9UA1A4A5A7A8ACAdB1b2b3b4b5b6b7C1C4C6D1d3d5d6E2E5E9EAF0F1F7FAFdH1H4H7H9HCHeatbank Overheat StatHot water high limit statNo codeoverheat lock-out statePOINT BPOINT CPOINT DPOINT EPOINT FPOINT HPOINT IPOINT JPOINT KPOINT NS9Safety limit statSy

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