Joanne266 said:Just an annual safety check. He didn't take anything apart - wasn't really there long enough to do that. Concentrated more on my hot water boiler if anything. The pump seems to be fine as far as i'm aware, all the radiators are heating up just fine. The only noise is from the boiler.
Nickso, another example of a "safety check" rather than a service.
A boiler would not suddenly make a banging noise. I am wondering if a motor valve is closing and the pump is either going off while the boiler is still on or the flow is being stopped before the boiler does. Whatever, it sounds as if it needs a competent person to diagnose the problem.
Tony