What is the most common reason a sump pump fails

https://waterdamagemoldstlouislab.clearhavendigest.com/posts/the-most-common-reason-a-sump-pump-fails-and-how-it-leads-to-water-damage-and-mold-st.-louis

The most common reason a sump pump fails is a stuck or jammed float switch, often caused by debris or a misaligned float arm. This prevents the pump from turning on when water rises, leading to basement flooding unless caught early.