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Happens about 20 mins after heating is turned on. attached is a video of it happening.
Discuss Really loud humming sound from "main Boiler" in the Plumbing Jobs | The Job-board area at PlumbersForums.net
You require the services of a gas safe engy sorry to say
Why?
Reply to Really loud humming sound from "main Boiler" in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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