I know but without keeping the tap on the boiler would over heat im afraid. Its generally only annually when the boiler is being serviced that this is required...

😂😂 the water police,

Witam mam taki problem z kotlem ze po zrobieniu testu również nie chce się uruchomić

Good point, I think you should skip the Important high/low combustion tests to save on water, so what if its not burning correctly you shouldn't waste water.