Does this look right to you??? What should each pipe do/go to/from?? A 'plumber has surgested that my kitchen radiator that does not work may be piped incorrectly.
just realised this is a follow on to previous thread
if rad gets hot when its the only one on its not blocked just open the other rads as little as possible to make them get hot
assuming both valves are closed open one full then put your ear against the rad and open the other till you hear water runmove to next radn repeat