I can ignite my light on my valliant combi bolier but the little dial in the right hand corner which is the gas pressure is at zero which keeps resulting in the boiler turning itself off. how do i turn up the pressure on my boiler ? i have no heating or hot water! HELP !! x

kiera, January 2010

that not gas pressure its the pressure in the heating system
you may see a silver flexible pipe under the boiler
with a tap on it thats where you fill it

b, January 2010