I wonder if anyone can help with this...
One radiator circuit is constantly hot even though the room stats are not calling for heat. So the rad circuit is being fed with hot wat er from the manifold if (for example) the hot water cylinder is calling for heat.
I suspected a stuck valve so I have removed the motor head. The 2-port valve seems to be open regardless of the spindle position. The spindle does not feel loose at all. Is it possible for the internal ball to be stuck in the 'on' position even if the spindle is in the 'closed' (11 to 5) position?
Any suggestions welcome! Tim
One radiator circuit is constantly hot even though the room stats are not calling for heat. So the rad circuit is being fed with hot wat er from the manifold if (for example) the hot water cylinder is calling for heat.
I suspected a stuck valve so I have removed the motor head. The 2-port valve seems to be open regardless of the spindle position. The spindle does not feel loose at all. Is it possible for the internal ball to be stuck in the 'on' position even if the spindle is in the 'closed' (11 to 5) position?
Any suggestions welcome! Tim