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Thanks for your reply Agile, this installion is the result of a formal complaint to the HA, after 2 years of listening to a rattleing case and very noisy fan, now have to listen to a pump which runs constantly. I know its faulty and i am sure they do, they dont want to call out Worcester to...

No, its the built pump that circulates the water around the system.

Thanks for the reply, I have had the installers out 4 times now and they come up with new reason each time, latest is I must use it on the timer, this still does not work, intalled by houseing association gas fitters, so I'm stuck. This is the condensing model fitted with seperate pump for...

Hi, I have recently had a Worcester 12i system boiler installed to replace old Baxi, my problem is that the built in pump will not shut off even when there is no demand ie no burner in use, it states in user manual that it should shut off after approx 3 minutes when there is no demand, is this a...