Thanks. I finally got into a determined mode and had a go. As Zagato warned, it was a real nuckle bruiser bruiser but I managed to reach the contact point between the cable and the "tap". Succeeded in turning the heater off. But it's a puzzle - while I was moving the tap back and fort I could feel the cable move also. So, it seems connected and not broken - but why won't it turn the tap?! Unless this is an illusion. Ah well, when cold weather approaches, I will have another go!
Cheers
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