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Its a honeywell motorised port zone valve it was a visual inspection of seeing it close by itself. Haven't taken a multi meter to it yet but I used an electric pen which showed power running through the cable.

The next day, I noticed I had no heating. I turned the thermostat up to 24°C and went to the boiler to observe its operation. I watched as the boiler fired up and the central heating zone valve opened. I listened carefully for any unusual sounds. After about ten minutes, the zone valve closed...

Hi everyone, I'm really struggling to diagnose the issue with my heating, and I could use some advice. About a week ago, my central heating suddenly stopped working, but my hot water has been fine. I’ve replaced my Nest 3rd Gen thermostat and redone all the wiring, but the boiler still refuses...