What to Do If Your Sump Pump Stops Working

Sump pumps are one of those things you don’t think about—until something goes wrong. If your sump pump isn’t pumping, it usually means water is going where it definitely shouldn’t.

Whether you’re dealing with a flooded basement or just some warning signs, here’s what to look for when your sump pump stops working, plus what you can do to fix it.

1. Water Pressure Is Building Up

One of the first signs that your sump pump isn’t working properly is when water starts pooling in your basement. This can happen when hydrostatic pressure pushes groundwater up through the foundation. If the pump fails to relieve that pressure, the water has nowhere else to go but inside. Installing moisture sensors and alarms can help you stay ahead of issues before they turn into major damage.

2. Your Sump Pump Can’t Keep Up

If your sump pump isn’t pumping water fast enough—or at all—it might be too small or simply not powerful enough to handle heavy rain. This is especially common in areas like St. Louis that experience large amounts of rainfall in a short time. A high-capacity cast iron pump, plus a battery backup or even a second pump, can make all the difference.

3. Power Outages Knock It Offline

Power outages are one of the most common reasons a sump pump stops working—especially during storms, when you need it most. First, check to make sure the unit is still plugged in and hasn’t tripped a breaker. For long-term peace of mind, a battery-operated backup pump can help keep water moving even when the lights go out.

4. It Wasn’t Installed Correctly

Even if your sump pump appears to be working, improper installation can keep it from doing its job. If no water is reaching the pit, the problem may be with the drainage system around your foundation. Homes should have a drain tile, gravel surround, or French drain that directs water toward the sump pit. If that’s missing, clogged, or installed incorrectly, your pump won’t have any water to remove.

5. It’s Full of Debris

A sump pit without a solid lid is a magnet for dirt, dust, and debris. Over time, this can clog the pump and cause switches to stick or fail entirely. If your sump pump runs nonstop or seems stuck in the “on” position, check for a jammed float or excess debris in the pit.

6. The Discharge Line Is Blocked

Your sump pump might be working just fine, but if the discharge line is clogged or frozen, the water has nowhere to go. This will shut down the whole system. In colder months, frozen lines are a common issue, and it’s best to contact a professional to repair or winterize your setup.

Still Not Working? Here’s What to Do

If you’ve gone through all the steps above and your sump pump still isn’t working, it may be time to call a licensed plumber or consider replacing the unit entirely. A professional can help diagnose the issue and make sure you have the right system in place to protect your home from future water damage.

If water has already made its way into your basement, Woodard’s water damage restoration team is here to help. Our experts are available 24/7 to remove standing water, dry out affected areas, and prevent further damage to your home or belongings. From minor leaks to major flooding, we’ll help you get things cleaned up and back to normal—fast.

Call us at (314) 961-9102 for immediate help.

About Woodard Cleaning & Restoration

Woodard Cleaning & Restoration was founded in 1946 by Earl and Nancy Woodard. Located in St. Louis, Missouri, Woodard services the greater metro area (Illinois, St. Charles County, Jefferson County, St. Louis County, and many more). Woodard is proud to serve as the preferred provider for cleaning & restoration services. Our cleaning services include carpet, hard surface, furniture, and rug cleaning for both residential and commercial properties. We also provide water, fire, board-up, storm and smoke restoration services for residential and commercial clients. For information or questions submit a form online or call us at (314) 227-3932.

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Updated 4/4/2025