Help please!
I have a boiler which will switch on with the timer in the morning and the evening if I have the Hot water only set. However if I set the time to be longer than an hour it will not come on. Even if I leave it for a couple of hours and try and switch it on it still won't come on. However if I swithc on the CH then the boiler does switch on - but only for the CH (even if the HW is on). The boiler services a hot water cylinder which is on the first floor and the water is pumped to this cylinder from the boiler.