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Mend Glow-worm 60FF Heating System Thermostat Boiler

Glow worm ultimate 60FF pump overrun too long..!?

Hi all, has any one encountered the pump running for more than 12hours...How long should the pump overrun be typically? is it a timed turn-off or temperature turn-off? has any body got the overrun circuit diagram?
The overrun is on the same boiler themostat..any help would be appreciated..Thks

ash
November 2009

Glow-worm Glow-worm 60FF Heating, Home Heating Systems Heating System Thermostat Boiler

The pump running for hours is normally a sign that the overrun stat is faulty. It is temperature based and normally switches off once the water temperature has dropped below 100°F

John T
December 2010

FULLY PUMPED OPEN VENTED
OR SEALED WATER SYSTEM
Remove red link between 9 and SL when
fitting a time control etc (if no switch is fitted,
link will make the circulation pump run constantly

b
November 2009

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Glow-worm 60FF Pump Overrun Issue - Help