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Worcester did make the wiring a little over complicated. Got a wiring diagram off them after facetiming them and showing them the boiler. Problem was with the post purge unit, but as all the wires were old I ripped the lot out and wired it myself. Pump runs as soon as the boiler is switched on...

I bought it second hand and previous owner had modified the wiring. I removed the hot water tank and diverter valve to make it lighter to move. Hot water 'stat was down to earth and removed the wires for it. Timer didn't work and he left loose leads from a different control.

I've got an old version of the above boiler and need a wiring diagram for it urgently. the ones available on-line all show 4 relays and plug in connectors. Mine only has 2 relays and no plug in connectors. If you know where I can look at an older diagram please send me a link. Alternatively can...