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    Drayton LP711 Backplate wiring for Combi boiler

    Hi Community, I hope you can help with this one..? My Ideal Isar HE24 recently failed. Hot water, but no heating. Home insurance sent a man - he said the LP711 timeswitch was at fault and did a temporary fix as an override. So now, when the boiler is switched on the central heating is on...
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