This video shows you how to bleed a towel radiator like a professional. The radiator is hot at the bottom and cold at the top, which means that there is air in the system and the system will have to be bled. To bleed the system, you will have to open the bleeder valve with a key or flat screwdriver. Turn off the system first, so that no more air can be drawn into it. Open the bleeder valve slowly by turning with the key or screwdriver until you hear air and then stop. If the air stops quickly you will probably have to pressure the system up again and shut it off and bleed again. Close the bleeder valve when all of the air is out. Start system again and check.