I turned off my radiator by mistake. Now I cannot get it to heat. Everyone tells me to bleed the radiator. I have a key, steam hisses out, but no water comes behind it. What am I doing wrong? Thank you, Claudia
You probably do not have sufficient water pressure in the system. Raise the pressure to about 14 pounds and see if it bleds properly, assuming that it is no more than a 2 story house.