We have a new Greenstar Condensing Gas Boiler (Worcester/Bosch) since a couple of weeks. During heavy load times, the boiler creates an annoying gargling noise, as if the condensate cannot drain for some time. This can last for an hour. Then it is quiet again.
This is not only annoying, I think the condensate is corrosive and needs to be drained, else it would attack the boiler.
Is this normal? Has anyone experienced this also? How can it be fixed?
Thanks from the Yorkshireman