Tony & Pete thank you.
I was not planning on entering the combustion chamber, I was following the Installation and servicing Instructions - looking at the Boiler schematic the exp vessel is inside - was only planning on doing step 4 below.
4. Remove the four screws securing the room...
Well I thought I'll have a look at the Expansion vessel so I removed the four screws securing the chamber panel but it does not seem to be possible to remove it, are there any other screws I need to remove, there is a big bolt in the middle but its not mentioned anywhere in the Installation and...
To start with I'm not an expert on plumbing or heating I freeze when anything happens.
When turning on the hot water tap the boiler fires up everything seems to work like normal, but as soon as the water gets warm/hot the pressure goes from green to 4 bar and the boiler stops, and before it...