What is the most common reason a sump pump fails 2

https://whysumppumpsfailedge.ironwoodscope.com/posts/why-sump-pumps-fail-the-most-common-reason-and-how-to-avoid-basement-flooding

The most common reason a sump pump fails is a stuck float switch. Over time, debris, mineral buildup, or simple wear can jam the float, preventing it from rising or falling properly. If it gets stuck in the 'on' position, the pump may burn out from continuous running; if stuck 'off', it won't activate when water rises. This issue often sneaks up in basements, leading to unexpected flooding. Regular inspection and cleaning of the float mechanism can prevent this, but many homeowners overlook it…