If you have 244v between neutral and the terminal where your brown of the zone valves are connected in your wiring centre, when the heating and hot water are in the off position, then you have a problem possibly from the nest end.
I would now test between neutral and brown of both of your zone valves when heating and hot water is still in the off position. Hopefully you won’t have 230 volts there. I would then separate the oranges on your zone valves and measure between neutral and each of the oranges in turn to see if...
Also the pump usually runs on for a few minutes after the demand for heating or hot water has ceased, in order to take the excess heat away from the boile.
The white flex appears to be connected in all the right places, albeit sub-standardly.
I would turn the heating and hot water to the off position and then check to see if there is any voltage between neutral and the grey wire. The boiler and pump should only fire up when there is a demand for...
I take it, your pump is inside your boiler? Ideally you need someone who knows how to test properly/safety. After demand for heating and hot water has ceased, you need to ensure that there is no voltage on Live return conductor at the boiler. Also them boilers have a link inside them that needs...
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