One radiator in the house is not working. It has worked but now isn't at all, I initially thought it was the trv but have followed all the suggestions on these pages to check that and I don't think it is. The piston moves freely when I've taken the trv off and it also works on another radiator. I know nothin about plumbing so don't know what to try next. Neither pipes coming in to the radiator seem to be hot, but I don't know anything about different valves or which end should be hot etc. etc. any advice would be very welcome
