What is the most common reason a sump pump fails 3

https://whatismostcommonreasonsumpinfo.solsticebrief.com/posts/what-is-the-most-common-reason-a-sump-pump-fails-insights-for-homeowners

The most common reason a sump pump fails is a stuck or clogged float switch, which prevents the pump from turning on when water rises. Debris, mineral buildup, or improper installation can jam the float, leaving you with a flooded sump pit. Regular cleaning and testing can help avoid this issue.