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That sounds like a plan. Ill do that this weekend and ill let you know the outcome. Many thanks for your advice Nick :)

The unhealthy sound at lowset speed caused the pipes to rattle like mad. No inhibitor was added when the pump was replaced. The system was not drained and cleaned. The plumber didnt give any indication why the pump failed. Im guessing it seized??

Hi guys, We have an 'Ideal Elan 2' boiler, its old but works very well. 5 Rads in the house, new Grundfos 15/50 pump. Well it was changed 1year ago. We dont have any TRVs on the radiators at the moment. 3 weeks ago the heating started to make a VERY loud humming noise that over powered the...