Just had a single radiator with no trv replaced for a new double convector rad with trv by a heating engineer problem is it wont run with the trv.I know the trv is fine but if I leave the head on it just goes cold.
I have to remove head shut off valve with the decorating cap and then draw water off from the other lockshield to get it to go hot again .this will stay hot all the time untill the trv is fitted.
I have to remove head shut off valve with the decorating cap and then draw water off from the other lockshield to get it to go hot again .this will stay hot all the time untill the trv is fitted.