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S.07 on Glow-worm Flexicom cx

Your boiler is briefly running the internal pump after the heating has switched off to cool down the internal components, which is a normal operation and typically not a fault.

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.

Technical description

pump overrun

What causes this fault?

This status appears when the boiler's internal computer determines that the heat exchanger is still very hot after a heating or hot water cycle. The pump continues to circulate water briefly to dissipate this residual heat and protect the internal components from overheating. Once the temperature drops to a safe level, the pump will stop and the display will return to normal.

DIY fix possible

Wait 5-10 minutes for the cycle to complete naturallyEnsure at least one radiator valve (bypass) is fully openCheck that your room thermostat is turned down

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Related fault codes

S.06View →S.08View →

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