I was wondering if someone could help. This morning when goign for a shoer there was no hot water. On inspection the boiler pressure was low so topped up from mains. Unfortunately the valve peg broke and by the time I turned the water off and closed it with a screwdriver it had overfilled.
It is off and i have tried to bleed the radiators to lower the pressure however when i switch it back on there is a knocking sound and the pressure gauge flickers. The boiler will light so not sure what the problem is.
Any help would be superb