What is the most common reason a sump pump fails 21
https://wiki-canyon.win/index.php/The_Most_Common_Reason_a_Sump_Pump_Fails_and_How_Gateway_Water_%26_Mold_Can_Help
The most common reason a sump pump fails is a stuck or jammed float switch. Over time, debris, dirt, or mineral buildup can prevent the float from moving freely, causing the pump to either run continuously or not turn on at all. This often leads to motor burnout or a flooded basement.