why sump pumps fail 16

https://page-wiki.win/index.php/Why_Sump_Pumps_Fail:_The_Most_Common_Reason_and_How_to_Avoid_It

Most sump pump failures come down to three issues: a stuck float switch from debris or a cramped pit, a burnt-out motor from running dry or cycling too often, or a clogged discharge line that makes the pump work too hard. If the pump runs constantly during heavy rain, the float might be jammed; if it doesn't run at all, the motor could be overheated. Regular checks, like clearing the pit and testing the float, can catch most problems before the water starts rising.