a work colleague of mine has this problem, and his local plumber has been out and can't figure out the problem!
this is all the info he has given me: so i am thinking it could be a handful of things, without knowing more about the external controls!
i have worked out it is not a combi, as you never have h/w and heating together with a combi anyway!
Gloworm boiler
heating OK when on its own
h/w ok when on its own
but when on both together: no htg!! just h/w
what could this problem be please?
this is all the info he has given me: so i am thinking it could be a handful of things, without knowing more about the external controls!
i have worked out it is not a combi, as you never have h/w and heating together with a combi anyway!
Gloworm boiler
heating OK when on its own
h/w ok when on its own
but when on both together: no htg!! just h/w
what could this problem be please?