preheat

Hello, Have a strange one, we had a gas engineer visit our flat yesterday and since then the boiler fan/pump seems to be always running. Our electricity useage has also increased massively, smart meter showing about 40p by the time we wake up in the morning when usually it would be about that...

Hi all, My WB 30i combi obviously provides DHW on demand at all times when a tap is opened. It has a preheat function to provide a small amount of pre-heated water to reduce DHW heating times - manual control is via the ECO/PREHEAT button. It also has a (usually linked) input to presumably...