Further update, I have turned the hallway thermostat upto high and the honey well motorised valves onto auto, the boiler kicked in and started to fill the rads, then before the hallway rad warmed up, the valve closed again. I had someone hold a cold air hairdryer near the hallway thermo to see if it sent a message back to the boiler to open the valve again, but it didnt open, which is faulty the motorised valve or the hallway thermostat on the wall?
Jue
January 2011