I have a vokera linea boiler and over the last couple of weeks it has been losing pressure day by day.Nothing drastic but i am having to top up pressure every 4-5 days.Boiler was serviced at end of Dec and was given clear bill of health.We have recently had an electric shower fitted but didnt think this would affect it ? can you help or do i need a plumber ?
thanks

Gary Macindoe, March 2010

Check the external wall where the boiler is fitted. There will be a 15mm copper pipe (Blow Off). If you can, try and feel if this is dry. Pressure can be lost this way. If it is dripping it will either be an expansion vessel/hose to vessel problem (Turn heating on and see if pressure increases sharply) or a faulty Pressure relief valve

Paul, March 2010