Boiler pressure gauge keeps dropping below 1 bar, needing regular repressurising
Hot water works fine but the central heating radiators stay cold, or vice versa
Boiler shows a fault code or simply won't ignite when heating or hot water is called for
Display shows EA and the boiler won't ignite or loses flame during operation
Display shows D5 and the boiler has locked out
Display shows F.28 or F.29 and the boiler has locked out
Display shows F.22 or F.75
Loud banging, rumbling, or kettle-like noise when the boiler fires
Central heating isn’t a modern idea — the Romans piped warm air under floors via the hypocaust system nearly two thousand years ago. But the boiler as we’d recognise it, a sealed unit heating water for radiators, is a much more recent British and European story, and one that’s changed enormously even within living memory. […]