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Why does my boiler stay alight?

my boiler stays alight after the programmer has switched off the pump then turns off but boiler keeps on going and then pressure makes pipes rattle and bang like mad can u help

simon
October 2009
Heating, Home Heating SystemsBoiler Stay Alight
if it's a combi then it'll be a sticking flow switch, if a regular boiler then a sticking microswitch on a motorised valve.

Ian
October 2009

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Worcester boiler dripping water?

Worcester boiler dripping water, can I just tight the screw? The icon next to the valve looks like radiators... [Read more]
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Mend Heating, Home Heating Systems
Mend repair fix home heating systems