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    Ultimate Glwwm 40FF - momentarily cutting out and reigniting

    Thanks for advice - it looked promising and I insulated it all up, but same thing keeps happening! I think it may be a call out to Glowworm - its just they charge £250 call out which if it is something simple will be hard to swallow. Apparently that charge covers anything wrong with boiler...
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    Ultimate Glwwm 40FF - momentarily cutting out and reigniting

    Need a bit of guidance to help my corgi man find the fault as he has tried new pcb board and fitted new control thermostat but boiler still keeps cutting out momentarily and reigniting, (along with an annoying bang), sometimes at about 1 sec intervals, then clears until another time...especially...
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