why sump pumps fail 17

https://wiki-byte.win/index.php/Why_Sump_Pumps_Fail:_The_Most_Common_Causes_Homeowners_Overlook

Sump pumps typically fail due to power outages, a stuck float switch, or debris clogging the intake. Over time, the check valve can get jammed, or the impeller wears down from constant use. In basements prone to flooding, heavy rain can overwhelm the pump's capacity, leading to motor burnout. Rust and corrosion also take their toll on older units, especially if the pit isn't sealed properly.