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Why Does My Sump Pump Run Every 5 Minutes?

Updated November 1, 2026 · General information, not plumbing or electrical advice

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The short answer: A sump pump that cycles every few minutes is either handling a lot of incoming water or something is wrong. The City of Ann Arbor lists a failed check valve, a stuck float or switch and an undersized pump as causes of a pump that runs too often or won't stop. SDSU Extension adds that discharging water close to the house can send it back to the pit in a loop. We found no official page that says what a normal number of cycles is, so we don't give one. If you can't find the cause, call a licensed plumber.

Safety first. Sump pumps run on household power in a wet place. Unplug the pump before you handle it, stay out of standing water that is near outlets, a panel or appliances, and hire a licensed electrician or plumber for wiring and plumbing work. Check local codes and permit rules. This safety note is ours, not from a source.

Causes to check

Water is coming back into the pit. SDSU Extension says that if the pump discharges close to the house, the water percolates back to the foundation, is collected by the drainage system, flows into the sump and is pumped out again, creating a loop. It suggests discharging at least 20 feet from the house if possible.
A failed check valve. Ann Arbor says a check valve lets water move one way only. If it fails, the pumped water flows back into the pit, so each cycle removes less water and cycles come more often.
A stuck float or switch. Ann Arbor says a stuck switch is the most common mechanical failure and can make the pump run continuously. The float can press against the side of the basin, or be blocked by sand or pea stone.
A pump that is too small. Ann Arbor says that if the motor is too small, water may enter the pit faster than the pump can remove it, so it can run continuously and burn out.
Sediment in the pit. Ann Arbor says a layer of sand around the sides or bottom of the pit could signal sediment entering from the footing drains. A small amount is normal; an excessive amount causes problems and calls for a qualified contractor.

Steps

Note when it runs. If it runs mostly after rain or snowmelt, the pump may be doing its job (our reading; the sources give no “normal” count). If it runs on a dry day, keep going.
Check where the water goes. NDSU Extension says the discharge pipe outside should be unplugged and direct water away from the house. SDSU says not to discharge into window wells, onto a neighbor's lot, into the municipal sewer or onto a septic drain field.
Unplug the pump and look in the pit. Ann Arbor's checklist says to look for silt or debris that could block the float, clog the impeller or clog the discharge.
Check the float. Ann Arbor says the pump must sit so the float moves freely and is not blocked by the pit walls, the discharge piping or other objects. If the float is stuck on something, unplug the pump, remove the obstacle and, if needed, reposition the pump.
Find the check valve. Ann Arbor says there should be one on the drain line just above the sump cover. If there isn't, contact a licensed plumber to add one.
Test the pump. NDSU Extension says to pour water in until the float starts the pump and make it turn on and off at least twice. If it sounds like it is pumping gravel or the float is sluggish, you may need a new pump or float.
Call a licensed plumber if the pump still cycles often, never shuts off or sounds wrong. Ann Arbor says most plumbers and some handyman services can repair or replace sump pumps.

Does your sump pump need a backup?

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Common questions

Is it normal for a sump pump to run every 5 minutes?

We found no extension or government page that says how many cycles are normal, so we don't give a number. SDSU Extension says the pump removes the water the drainage system collects from high water table situations, so a pump that runs a lot while water is coming in may simply be working. If it keeps cycling and you can't tell why, check the causes above or call a licensed plumber.

Can a bad check valve make a sump pump run too often?

Yes. Ann Arbor says that if the check valve fails, the water pumped out flows back into the pit. That decreases the amount of water removed per cycle and increases how often the pump cycles, which can make the pump fail early.

Can a stuck float make a sump pump run all the time?

Yes. Ann Arbor says the most common mechanical failure is a switch stuck in the ON or OFF position, which makes the pump run continuously or not at all. It also says a float can get pressed against the side of the basin, or be blocked by objects such as sand or pea stone.

Should I unplug the pump to make it stop?

Unplug it to inspect it (Ann Arbor and SDSU both say to unplug before you touch the pump), but a pump that is unplugged can't protect the basement. We found no source that advises leaving it off. If you can't fix the problem the same day, call a licensed plumber.

How long does a sump pump last?

Boston's city estimate is a useful life of 7 to 10 years for a sump pump installation. A pump that sounds like it is pumping gravel or has a sluggish float may need to be replaced (NDSU Extension).

Related guides

Sources

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