My Zoeller M-53 (1/3 HP) sump pump does not switch off. I.e., the sump pump kicks on fine when the float gets to the level that causes the pump to kick on. It begins to pump water out like normal but then when it gets to a certain point, it stops pumping water out. The pump keeps running but the water level doesn't recede any further. I have to push the float down a little bit in order for it to stop running.
Any ideas what I could do to fix this problem? Is the switch going bad?
Thanks, Kevin