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Mend Glow Worm Ultimate 100FF Boiler Water Tank System Heating

How can I get my Glow Worm Ultimate 100FF boiler working?

I have a sealed water sytstem with a pressurised Megaflow hot water tank. Occassionally the system pressure just drops to almost zero for no reason and the boiler will not fire up again. I think its the water pressure switch that effectively switches off when the pressure drops but I don't know how to reset it. I've re pressurised the system to 2 bar but still it won't fire. Any ideas?

Jim Thomas
December 2009
Glow WormGlow Worm Ultimate 100FFHeating, Home Heating SystemsBoiler Water Tank System Heating
It might also have overheated when the pressure was low (less water content, too much heat) I think that there is a reset button on these, its been a while. Red with a cross shape button push this in , you'll feel it click. Then fire it up

Mark gas engineer
December 2009

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Glow Worm 100FF Boiler: Low Pressure Fix