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Thanks for the assistance folks, I got my installer out and he agreed there was a noise issue, he adjusted the pump speed down, and the noise reduced significantly. I haven't noticed any adverse affect on the heating, so hopefully I'm sorted ! Tony.

Thanks Boxster, logged a call with WB, engineer called and said nothing wrong, sounded OK to him, but he turned pump speed to 2. Noise still reverberating through the house. Would speed setting 1 be acceptable do you think ? I'm gonna go listen to another WB Junior boiler to compare...

Hi, I have just had a Worcester-Bosch Junior 28i combi gas boiler installed, and it makes a very annoying "humming" noise. It sounds like someone using a vacuum cleaner next door. It's enough to wake me in the morning, yet the boiler is in the attached garage. The noise disappears when a...