Medium
POINT F on Worcester Bosch Highflow 300

Your boiler's internal pump is failing to run its normal cooling-down cycle after you turn the heating off, which could cause the unit to overheat.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Pump does not continue to run for approx. 5 minutes when central heating or programmer is turned to OFF

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 internal computer fails to keep the pump running after the burners have turned off. The most common reason is a failing circuit board that is no longer sending power to the pump, or a pump that has become seized and cannot complete its essential cooling cycle.

This fault often becomes apparent in the spring when the central heating is used less frequently, causing older pumps to seize during longer periods of inactivity.

Engineer required

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

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Related fault codes

POINT EView →POINT HView →

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 GPOINT HPOINT IPOINT JPOINT KPOINT NS9Safety limit statSy

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