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  1. I

    concord boiler wrs240b

    Have recently refilled my boiler after draining down for repair .It now appears to be getting too hot.The casing is very hot and the water is going over the overflow into the make up tank.Is it likely to be a air lock within the boiler or could it be the thermostat in the boiler not cutting the...
  2. I

    ravenheat 820/20 combi boiler

    DHW only works when CH on too...then a bit hit and miss...think it may be diaphragm on diverter valve??..if not what else could it be
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