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The boiler is a Potterton Profile. There is a programmer and a room thermostat, plus there is also a cold weather over-run thermostat. All those seem to be working ok. The only problem is that the pump is now on all the time. I have also noticed that from time to time the boiler fires up by...

Hi all, I've just noticed that my Myson Compact CP63 seems to be stay on all the time. Is this normal (and I've only just noticed because it is making noise and needs bleeding) or has something gone wrong? Any help would be appreciated!