this problem could be be a lazy or seized pump the way to check it is to remove the big silver screw in the front of the pump and run central heating you should be able to see the spindle spin inside ,hold a small bowl under the pump whilst you do this to catch any spills if it isnt spinning using a flat headed screw driver spin the spindle back and forth then replace the silver screw, also ensure you have enough pressure in the heating system displayed on the front of the boiler if not top it up using your filling loop, if pump still isn't running you need to check you have power there if there is power and pump isnt running new pump is required after checking these and still can't find fault post another thread to mike
mike
December 2005
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