What is the most common reason a sump pump fails

https://whatismostcommonreasonsumppost.valoradigest.com/posts/what-is-the-most-common-reason-a-sump-pump-fails-a-plumber-s-perspective

The most common reason a sump pump fails is a stuck or jammed float switch, often caused by debris or a misaligned float arm that prevents the pump from turning on when water rises.