I installed a new float switch for my auto bilge, I can raise the switch up and the ball inside rolls back and turns the pumps on but when I let the switch back down the ball rolls forward but doesnt turn the pumps off. I have to jiggle or bounce the switch to get it to turn the pumps off. Do i have a defective switch. I know its the right switch i got it from BCB and it is exactly like the old one. thanks