i have a vokera boiler which is not fire up on central heating but coming on when hot wateris on

michael stainthorpe, November 2006

if the boiler has low water pressure it will not work on either heating or water it gos into lock out mode. could be the heating sensor.need to go through a diagnostic to get more info

hi-spec plumbing, November 2006

Not good this time of year - I had one of these boilers several years ago which did the same - check that you have water pressure in the central heating system - if there is no pressure the system will not start up - from what I remember you need at least 15 psi (1 bar) to start - If I think of anything else I will add - good luck !!

Martin Hollebone - Northampton, November 2006