Thanks - water starts flowing as soon as I turn the bleed key!
Just tried closing the shieldlock valve and leaving the thermostat valve open - water flows from the bleed valve but if I push the therm valve pin in it stops - so I assume the valve is actually working! The water coming out of...
Hopefully someone can help!
One radiator is always cold. The pipe to the lockshield valve is slightly warm, pipe to the thermostatic valve is cold - both are fully open.
Thermostatic valve pin moves freely and have tapped it a few times to make sure.
If I bleed the radiator and leave...