1. The pressure indicated is 1 Bar.. when the Boiler comes on it goes to 1.5 Bar. Is this normal?
2. Please explain clearly how to increase the water pressure

Francis Mallia, January 2011

hi, 1 bar is ok on combi boiler, if it gets to low the boiler wont work, there could be a red filling knob built in inside boiler casing, or done with a removable fillin loop from mains. its easy 2 do but unless your competent i would get a engineer to adjust it . be safer. cheers!

martii, January 2011

it is normal for the water pressure to increase when boiler is a light. as for topping up the pressure there should be a filling loop check your user manual for directions on where and how to use. If not in manual there should b a small flexible silver pipe that forms a loop between two pipes ( should be on pipework under boiler). Sometimes the loop is disconnected so check its not been left on top boiler or is hanging up in the location of the boiler

chris, January 2011