spaguy

It sounds like it might have air in the Line going to the Circulation Pump, Try to loosen the conection to the circulation pump, it should be a 1/2" hose. The circ pump will be directly behind the Control box. If you remove the hose and allow the water to flow through, then replace it, that should fix your problem, if there is no air in that line, my recommendation would be to check the circ pump to make sure its working. you have to remove the access panel to check the pump, it is small and very quiet.