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Hi All Thanks everyone for your advice, I have rather belatedly tried a few things to understand what is going (hopefully not made anything worse!) 1. I managed to turn the valve using a plier for some light leverage and could get the central heating working. 2. After using the plier, I...

Hi Simon Thanks for the quick reply. I have taken off the head and tried to turn the valve (see image 001) by hand but it was not moving. Should I be able to turn it by hand or would I need to add some pressure using pliers? I've added another image of the head, the lever even with no power...

Hi I have seen this asked a few times but the posts were a few years old so I would like to ask again. The motor head valve (excuse my terminology) I believe has failed. I believe it has failed because when I turn the power off to the unit the lever does not reset. In fact it does not move...