-
Or the opposite? Our flat wasn't warning up, the boiler would turn on and then turn off again after about 6 seconds, the boiler temp was set to 35 degrees, which it was achieving very quickly. Turned it up to 50 degrees and the water was actually hot enough to warm the radiators up.
Maybe the reason it's always on is because the boiler is warming the central heating water to 70 degrees or something ridiculous.
Does the boiler have its own temperature control? Sounds like it might need turning up.