Six Warning Signs Your Sump Pump Is About to Quit

It short-cycles: on, off, on, off

A pump that kicks on every minute or two, runs briefly, and shuts off is usually not moving new water — it is re-pumping the same water. The classic cause is a failed check valve letting the discharge column fall back into the pit after every cycle. Short-cycling also comes from a float set too tight to the pump. Either way, the pump is racking up start cycles, which is what actually wears motors out, and the fix is typically a cheap part rather than a new pump.

It runs constantly, even in dry weather

A pump that never shuts off in August is either fighting a genuinely high water table, stuck on because the float is jammed or wedged, or pushing against a blocked discharge and moving nothing. Feel the discharge pipe: if the pump is running and the pipe isn't cool with moving water, it is deadheading and cooking itself. Continuous running is the single most urgent symptom on this list, because motor burnout follows in days, not months.

It rattles, grinds, or gurgles

Mechanical noise is the impeller telling on itself. Rattling or grinding usually means gravel or debris has been pulled into the impeller, or the impeller is damaged and out of balance. Loud gurgling at the end of a cycle often points at check valve or discharge geometry problems. A pump can run for a while sounding like this, but it is running injured — and the debris that caused it is still in the pit waiting to finish the job.

Rust, age, and a pit that smells

Visible rust on an older pump body, a pit coated in orange slime, or a swampy smell are all quiet degraders. The orange residue is often iron bacteria — harmless to people, hard on pumps — which gums floats and clogs the pump inlet over time. Add the age math: a pump near or past the ten-year mark showing any symptom on this page has earned a planned replacement on your schedule, rather than an emergency one on the storm's schedule.

It didn't run during the last storm

The most dangerous sign is silence. If a storm soaked the neighborhood and your pit stayed full while the pump never fired, treat it as failed today, not 'worth watching.' Test it with a bucket, check the outlet and breaker, and look at the float — and if it still will not run, that is an urgent call. Hanna answers 24/7 for exactly this, and a failed pump ahead of more rain is a legitimate emergency, not an overreaction.

Repair or replace: the honest quick math

Floats, check valves, and cleanings are repairs worth making on a pump with years left. A motor failure on an old unit is a replacement, because you would be re-powering a machine whose bearings and seals are already spent. Hanna's techs are paid hourly with no quotas, so the recommendation follows the diagnosis — and if a fifteen-dollar check valve fixes it, that is the ticket you get. Replacements install Zoeller cast iron with a one-year workmanship warranty.