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Hi Dan, Thanks for your help. I managed to sort it out by partially opening the pump input connector which allowed a lot of air to escape (a loud hiss being heard). I then partially opened the output connector and there was a small hiss and bubbles. Everything is working fine again. This was...

Thanks Guys for getting back so quick. I have taken the large silver screw off the centre of the pump and can see it turning. The pipe on one side of the pump is very hot (input from the boiler I presume) and the other side although hot its not as hot and the further along that pipe you go...

Hi, I drained down my central heating system which is approximately 12 years old to fit a towel rail and now my system is not functioning properly. It was ok before it was drained down. The symptoms are the pilot flame is ok and the boiler does fire up every now and again and gets very hot but...