Hey guys, I've just bought a house recently, I already have a British gas Worcester boiler already. As I'm doing it up myself I spent quite a bit of time in there. What I realized, that the boiler starts up for a minute in every approx twenty minutes for a minute. I don't have the 'keep the dhw hot function' on, as far as I'm concerned as the Eco light is always green. I have a wireless thermostat what I already moved into an other room but same stuff. It's a Drayton 3. My gas bill is going high and I don't know why. Any ideas please? Thanks, Tony