worchester combi 28cdi gas boiler?
pressure shows 1 bar and when I turn on heating pressure goes up to 3 bar and then when i turn off heating pressure goes down to 0. I fill up system to 1 bar and turn on heating pressure goes up again between 3 - 4 bars, when i turn off heating pressure goes down again.
Darius Karpuska, January 2011
