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« on: April 24, 2009, 12:53:12 PM » |
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In this case there will also be no heat. The most common reason for this is an air lock in the pump. To fix this close the valve on the suction side of the pump. (closest to where the water enters pump) Then open the union (in front of the pump) It does not have to come all the way off just loosen it enough to let the air escape from inside the pump. After you hear the air and get water again tighten the union, open the valve and turn the system back on. The other causes of no flow could include dirty filter, stripped or broken impeller, plugged line or clogged impeller. Also make sure that all valves before and after the pump are open.
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