if the pilot light is on then the programer must call for hot water or heating check the room stat is calling for heating check the programer is calling for water or heating ,you may also check your pump is running,if the pump is exessively hot,it may have burned out,swich it off,and get acompetent person in to replace it,a new grunfoss pump retails about 70 pounds (plus labour)
stewart
December 2008
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