why sump pumps fail 2

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

Sump pumps fail when they lose power, get stuck from debris, or have a float switch that jams, which is common after storms. Over time, the impeller, which pushes water, wears down, especially if it's filled with sand or silt. A burned-out motor from continuous cycling or a faulty check valve forcing it to run too often also leads to failure. Poor installation, like a pit that's too small, can cause rapid on-and-off cycles, wearing components quickly.