As hot at inlet, check outlet valve, as no circulation, water just standing in radiator would be cold.
SD
December 2011
Thermostatic radiator valve jammed. Take off the head and see if the pin is down. If so, bang the chrome part of the valve with a set of adjustables until the pin releases up.
Joe
December 2011
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix home heating systems.