why sump pumps fail 8

https://wiki-triod.win/index.php/Your_Sump_Pump_Failure_St._Louis:_The_Most_Common_Reason_and_How_to_Avoid_It

Sump pumps usually fail because of a stuck float switch, often from debris or a misaligned arm, which keeps the pump from turning on. A clogged intake screen or discharge line can also cause burnout, as the motor runs dry or overheats. Power issues, like a tripped GFCI or loose wiring, are common too. Regular cleaning and testing before heavy rain can prevent most failures.