Sump Pump Running Constantly? This Is What It Could Mean

If your sump pump won’t stop running, don’t ignore it. A sump pump that cycles continuously can lead to premature motor burnout, a flooded basement, and an expensive repair bill.

At Cooper Mechanical Services, we’ve been diagnosing sump pump problems for homeowners across Willow Grove, Horsham, Abington, and Montgomery County since 1930. Here’s what a constantly running sump pump usually means and what to do about it.

TL;DR

A sump pump running constantly usually points to a stuck float switch, an undersized or failing pump, high groundwater, or a discharge line problem.

Key Takeaways

A sump pump that won’t stop running is working harder than it should
Continuous running leads to motor burnout and unexpected sump pump replacement
A professional inspection identifies whether repair or replacement is the right fix
Montgomery County’s clay-heavy soil makes persistent groundwater intrusion common

Why Is My Sump Pump Always Running?

Your sump pump is designed to run in cycles. It activates when water rises, pumps it out, then shuts off. When it runs without stopping, the system is telling you it either can’t keep up with incoming water or something mechanical has failed.

Here are the most common causes we find during spring service calls in the Willow Grove area.

A Stuck Sump Pump Float Switch

The float switch tells your pump when to turn on and off based on water level. When it gets stuck in the “on” position, the pump runs even when the pit is empty. Running the motor dry overheats it quickly and is one of the fastest ways to shorten a pump’s lifespan.

High Groundwater or a Wet Season

Southeastern Pennsylvania’s clay-heavy soil retains water longer than sandy or loamy soils. During heavy spring rains or periods of snowmelt, the water table in areas like Willow Grove and Horsham rises and can stay elevated for days.

If your pump is running constantly during or after significant rainfall, it may simply be handling a legitimate volume of water. The concern is whether your current pump is sized correctly for that demand. An undersized pump running at full capacity around the clock will fail prematurely.

A Discharge Line Problem

Your pump moves water out through a discharge line. If that line is frozen, clogged, or improperly pitched, water gets pushed back into the pit. The pump runs again to remove the same water in a continuous loop.

This is one of the more commonly overlooked problems because the pump appears to be working. The real issue is that the water has nowhere to go.

The Pump Is Undersized or Aging

If your home has expanded, your landscaping has changed, or your pump is more than 7–10 years old, it may no longer be adequate for the job. An aging pump that struggles to keep up will run constantly trying to compensate. It’s only a matter of time before it fails.

When to Call for Sump Pump Repair vs. Replacement

Not every constantly running sump pump needs to be replaced. A stuck float switch or a clogged discharge line are often straightforward sump pump repairs. However, if your pump is older, has been running continuously for an extended period, or shows signs of overheating, upgrading your plumbing is likely the more cost-effective long-term solution.

At Cooper Mechanical Services, we look at pump age, pit size, water volume, and discharge line condition before giving an honest recommendation.

FAQs

Can a sump pump burn out from running too long?

Yes. Running continuously overheats the motor, degrades the seals, and dramatically shortens the sump pump’s lifespan. If your sump pump won’t stop running, treat it as an urgent issue.

How do I know if my float switch is stuck?

Look into the sump pit. If the water level is low or the pit is empty but the pump is still running, the float switch is likely stuck in the on position. You can try gently repositioning the float by hand, but if it doesn’t resolve the issue, call a plumber.

How long should a sump pump last?

Most sump pumps last between 7 and 10 years with normal use. Pumps that run frequently due to high groundwater tend to wear out faster. If yours is approaching that range, replacement is worth considering before it fails during a storm.

Should I be concerned if my sump pump runs during heavy rain?

Running during heavy rain is normal. The concern is when it runs constantly for hours after the rain stops, or runs without any rain at all. That points to a mechanical issue, high groundwater intrusion, or a discharge line problem that needs professional evaluation.

Need Sump Pump Services? Call Us!

A sump pump running constantly is a warning, not something to wait on. Cooper Mechanical Services has served homeowners across Willow Grove and Montgomery County for nearly a century. We’re available 24/7, answer every call with a live person, and diagnose the underlying cause rather than just addressing the symptom.