I have Danfoss rad valves fitted to 10 seperate rads,one has recently stuck & will not let the rad warm up.all the valves are 10 years old. I dont know the model number,It is a white plastic cone type,can I remove the plastic top and try freeing off the plunger inside

alan, December 2010

if the top comes off then yes you can.get 2 spanners and hit the valve body 180 deg apart at the same time as this can free the plunger.Don't hit it to hard or you will break it but you get the idea hopefully!

A1, December 2010