my vokera combi boiler is loosing pressure so I have to keep adding pressure daily could there be a problem with the boiler the engineer has not checked anything in the boiler but said there is probably a leak from a pipe but we cannot find one any where. the boiler is about 8yrsd old and been serviced regularly

mrs d sawyer, October 2009

check the expansion vessal vavle , charged to 0.7 and no water presant..

geo, October 2009

Loss of pressure does mean a leak, unfortunately, and the first thing to check is the overflow outside.

John, October 2009