The boiler overflow pipe that goes outside is dripping hot water frequently. The pressure is also very high at times. The water & heating are approx. half way up for heat setting, so not very high.

Please could anyone answer - Why is the pressure high & how can i stop the water leaking out? it has been happening for sometime as the lower wall is greeny /mossy/ damp where the warm falls.

How can i fix it?

Joanne, May 2010

you need to have the expansion vessel re-pressurised and the pressure relief valve replaced. best to clean out the flexible expansion hose at the same time as they are very liable to blocking up on this boiler.

Ian, May 2010