Wiring up a motorised valve

Plumbing Fittings

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For most homeowners one look inside a central heating wiring centre is enough to convince them to get the professionals in, which is a shame because the most common failures in a central heating system are the pump and the motorised valves and these are both wired back to this complicated, spaghetti like, mass of wires.

Fortunately, things are getting easier. For pumps it was never that difficult, they only have 3 wires: live, neutral, earth and if you can’t manage 3 wires you really have to ask yourself if you should be doing this at all. That said, only good can come from keeping people away from the wiring centre, so these days the cable on most pumps comes with a kettle-like connector that can just be detached and plugged in to the new pump, the proviso being that you replace like-for-like.

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