Thanks for reply. Been onto Vokera who say this boiler doesn't have a diverter valve, central heating side consists of a pump, heat exchanger and thats pretty much it. Still cold and frustrated!!.
Hope someone can help.
We have a Vokera compact 28, 5 years old. Was fine till we added some cleaner to the system and in the space of a week all radiotors were cold. Hot water was and is fine. Have flushed out the complete system twice now so I know there are no blockages in the pipes. British...