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How canb I fixed my grundfos central heating pump ?

The pump will not work, but the hot water system is OK
Brian Russell, October 2009
Undo the central large slotted screw, prepare for leak dribble. behind this you'll find another slotted screw which is the end of the pump impeller. Spin this to free the pump if it has jammed. If still no joy, have the pump replaced.

John, October 2009
link Click here to see other fixes for Grundfos.