Hello everyone, My boiler has a problem since yesterday: it stays on for a few seconds and shuts off, then on again in about 10 minutes, then off after a few seconds and so on. The room thermostat sends the "switch on" signal fine (obviously, it is rather cold in the house now, so the thermostat is constantly telling the boiler to switch on). I have bled the radiators, there is no air in them. My only guess is faulty pump, and I am thinking to call an engineer on Monday, but I was just wondering if I might not be missing out something obvious. Could there be some air trapped in the boiler, for example, that could be let out? The boiler is a Ferroli Combi 77 FF, a rather old one but has been working faithfully so far. Many thanks for your advice!