I
Igorian
Hi, My Potterton Statesman Flowsure is overheating when using DHW. The water runs warm for a time and then cold. The temp guage on the boiler runs to max and then it cuts out and then has to be left for a while to cool before I can reset it. Pressure looks ok (1 bar rising to 1.25bar when hot), expansion vessel appears normal (gas from valve when checked), no air in rads. Boiler bleed points vent boiing water when opened.
Any ideas please?
Any ideas please?