A sump pump that runs constantly, cycles with no water in the pit, or stays silent during a heavy storm usually comes down to a stuck float switch, a failed check valve letting water flow back into the pit, a pump undersized for the space, or a discharge line clogged or frozen outside. A battery backup that never kicks in is often a dead battery or a bad charging unit.
If the basement is actively flooding, unplug the pump at the outlet before touching any standing water, and keep cords and power strips off the floor. Do not reach into the pit while the motor is running.
Grinding noise, a breaker that trips repeatedly, or water rising even with the pump running are reasons to stop and call. Smart Pro Plumbers connects Chula Vista, CA homeowners with a plumber who installs, tests, and replaces sump pumps and battery backups. Reach the referral line at (844) 898-0295.