I have a problem with my centreal heating system.
after we go to bed and the timer has turned off and is pogrammed not to come on again until 6:30am, we sometimes find that the boiler and pump will start during the night. The boiler is located in the garage and there is a froststat located just above the boiler.
Last night the boiler came on. Even if the froststat had triggered, what I don't understand is why all the radiators in the house get hot? It makes sleeping at night uncomfortable as it is so warm in the house.
Anyone any thoughts are to what could be triggering the boiler?