Signs Your Sump Pump Is Failing

Seven Warning Signs to Watch For

1. The pump runs continuously

If the pump is running even when there has been no recent rain, the float switch is likely stuck in the triggered position, or groundwater inflow is exceeding the pump's capacity. A pump that runs constantly will burn out the motor within weeks. Have it checked before it fails under load.

2. The pump never runs during rain

If your basement gets wet but you never hear the pump cycle, either the float is not triggering at the right level or the pump has already failed silently. Test it by pouring a bucket of water into the pit slowly until the float lifts. If it does not trigger, something is wrong.

3. Strange noise during operation

A gurgling or grinding sound during the pump cycle usually means the impeller is partially clogged with sediment or the motor bearing is failing. Either way, the pump is working harder than it should and will not last much longer at that rate.

4. The pump is more than 7 years old

Residential-grade sump pumps have a realistic service life of 5 to 7 years under Maryland conditions. Commercial-grade cast-iron units last longer, but no pump runs forever. If yours is approaching a decade old and you do not know when it was last serviced, schedule an inspection before storm season.

5. Visible rust or corrosion on the housing

Rust on the pump body means the housing material has degraded, which often correlates with internal deterioration. Plastic-housing units rust at the metal fittings first. Cast-iron units are more resistant, but the intake screen and float hardware can still corrode.

6. Water in the pit between rain events

Some water in the pit is normal if there is active groundwater pressure below the slab. But water that rises significantly between rains, especially in dry periods, can mean the check valve is leaking and water is back-flowing from the discharge line. The pump then runs more often than it should, cycling on water it already removed.

7. The backup alarm has sounded

If your backup system alarm has activated, the primary pump either failed to trigger or failed mid-cycle, and the water rose to the backup threshold. Do not silence the alarm and ignore it. Find out why the primary did not handle the load before the next storm.