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Boiler: Baxi Solo WM50/4 Pump: 1 Month old Grundfos UPS2 50/60 Programmer: Potterton EP2000 Problem: Had the heating on and was working fine, has been working fine for around a month since the Pump was replaced with a brand new Grundfos UPS2 by a certified installer. However it started...

Hi, A few days ago there was a banging\knocking noise coming from my boiler, it then went out and only the pilot light was on. I left it off overnight and tried it again the next morning, boiler fired up fine but after a minute or two the noise came back and it went out again. I called the...