Postby krystyna » Wed Feb 25, 2015 4:14 pm
A friend has suggested :-
It might be a stuck pin in the Thermostat Valve. This can be accessed by unscrewing the clamp under the Valve and lifting it off. The pin in the centre is spring loaded but sometimes gets stuck down (often when the Valve is turned off for long periods). With a pair of pliers, this pin can be pulled up gently. It is spring-loaded and only comes up about 3 or 4 mm. You can then press it down a few times to make sure it springs up every time.
Replace the Valve Head (set at highest number, maybe 5 or Max), positioning the number viewing bit so you can see it easily, rescrew the clamp, and set the Valve Temperature Number to your usual comfortable heat setting (maybe near 3). As your room warms up, the valve gradually closes. If still chilly, adjust number slightly, say to 3.5, until comfortable.
Hope this helps.