I replaced my old switch this morning with a 30/50 ProPlumber from Lowes. When I turned the juice back on the pump stays on. I have to cut the power to get it to go off. I may have crossed the white and black wires when I put the switch on. Would this cause the problem? I made sure my tank was set at 28 lbs. as recommended. I have PVC pipes and am affraid to let the pump run more than four or five minutes. I don't want to spring a leak in the wall somewhere. Any help would be greatly appreciated.