if the valve is not turned on then there is no water in the boiler, it's a black valve, yellow valve supplies the oil to the boiler. if valve not turned then no water at all in boiler as nothing comes out when taps turned off. Just wondered if anyone on here knew anything obvious that we...
Hi just wondering if anyone has any ideas on how to fix a problem. Just moving into new house and it has vokera combi boiler. Heating all working fine and hot water is hot. We have an external metal pipe (which i would guess is overflow of some kind) and when we open the valve to allow water...