hi, glow worm fuelsaver 55ff runs for about 4minutes starts to heat up water and rads but then switches off for about 6 minutes then repeats cycle obviously not giving it time to heat rads. any suggestions for a cure would be appriciated.
When it has just gone just gone out see if boiler stat is clickin still if it is then its not a case of the boiler overheating.
Iwould then be looking at the gas valve solenoid breaking down under use.
If it was the motorised valve both HW /CH would not be affected.
If it was the pump then you would get a banging noise with the heat in the boiler
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