We may have found other answers which could help you.
Click here for Boiler Temperature RadiatorsHow can I fix my Vokera 20/80 R.S. Flowmatic, the water upstairs is cold?
vokera linea 28 and when i switch it on to just hot water the radiator?
i have a vokera linea 28, the hot water is fine but the radiators wont work?