What is the most common reason a sump pump fails 13

https://wiki-site.win/index.php/Why_Sump_Pumps_Fail:_Expert_Insights_from_Gateway_Water_%26_Mold

The most common reason a sump pump fails is a stuck or jammed float switch. Over time, debris or mineral buildup can prevent the float from moving freely, so the pump either runs nonstop or doesn't turn on at all. I've seen this happen when people don't check the pit regularly, and a small rock or rusted residue locks up the mechanism. Keeping the pump clean and testing the float every few months can save you from a flooded basement.