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  1. G

    Rads stay hot

    Have a problem with a Gloworm Ultracom 30 CXi boiler. With all valves on the rads closed and the room stat turned down the rads stay cold - OK so far. If I open a valve the rad stays cold - still OK. If I turn the room stat up the rads with open valves get hot but some of those with closed...
  2. G

    Glow Worm Ultracom 30 cxi - no heating

    Help - we recently tried the CH for the first time since before summer and although we get DHW the boiler doesn't fire up for CH. Room stat clicks at about 23 degrees - have even tried replacing the stat but made no difference. The internal timer on the boiler is disabled for CH although I...
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