Pump ok. Lockshield valves appear to be open on all faulty rads. Not sure how to remove thermostatic radiator heads. Have tried to look up advice on this, but can't find any. Any suggestions?
We have oil central heating, supplying 11 rads in a bungalow. The boiler is situated centrally in the house. All rads are fitted with thermostats. When we moved in about 4 years ago all rads worked fine. However, each autumn/winter since, when we have put the heating back on, some rads have not work...
