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Mend Glow Worm Ultimate Boiler Central Heating Programmer

Central Heating Pump is not always swithing off?

The pump which is linked to my Glow Worm Utimate boiler is not always switching off even after the Programmer abnd boiler are off

Gordon R
August 2009
Glow WormGlow Worm UltimateHeating, Home Heating SystemsBoiler Central Heating Programmer
Thanks for the pointer - I will have a look at the thermostat. I assume it is the boiler stat and not the Hot water stat you are referring too?

Gordon R
August 2009
the system may have a pump over-run thermostat built in, some glow worm boilers do. it should stop the pump after a few minutes once the boiler has cooled down enough to prevent overheating. if it's staying on for more than 5 minutes i'd guess that the thermostat may need replaced.

Ian
August 2009

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Glow Worm Ultimate Pump Running - Fixes & Help