All 4 radiators ground floor is not heating, but all radiators upstairs is working fine.
All 4 radiators bled, flushed, removed and cleaned.
After all the line cleaned, flushed and bled the initial re-installation of the cleaned radiators the hot water flows in but after 5 minutes it seems like the cold water has strong flow as it cools back again the radiator and it stays cold.
I'm assuming that my heating system is conventional heating system (looking into your schematic diagram) the only difference is the hot water tank is located ground floor.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!