Why Is My Sump Pump Running Constantly in Dry Weather?
Last updated October 31, 2026
The short answer
Groundwater Seepage
Even in dry weather, high water tables or poor drainage around your foundation can keep water flowing into the sump pit. Rain from days earlier might still be percolating through the soil. If your sump pit sits low, groundwater pressure can push water through cracks or joints in the foundation.
Look for wet spots in your basement or crawlspace. If the pit refills quickly after pumping, the issue is likely incoming water. You may need to improve exterior drainage, such as extending downspouts or regrading the soil away from the house. A local water damage pro can help assess the situation.
Float Switch Problems
The float switch controls when the pump turns on and off. If it's stuck in the 'on' position, the pump runs even when the pit is dry. Debris, mineral buildup, or a misaligned float can cause this. Check the switch for obstructions and make sure it moves freely.
If the float is tethered, the tether may be too short, keeping the switch engaged. Adjust the tether length so the pump turns off when the water level drops. If the switch is damaged, you may need a replacement. This is a simple fix, but if you're unsure, a pro can handle it.
- Check for debris around the float
- Ensure the float moves freely
- Adjust the tether length if needed
- Test the switch manually
- Clean the switch with a soft brush
Check Valve Failure
The check valve prevents water from flowing back into the pit after the pump shuts off. If it fails, water returns, causing the pump to cycle frequently or run constantly. A broken or stuck check valve is a common culprit.
Listen for a thudding sound when the pump stops, which indicates backflow. You may need to replace the check valve. It's a relatively inexpensive part. If you live in Columbus, keep the valve location written down for future reference.
Pump Losing Prime
If your pump is not priming correctly, it may run without moving water. This can happen if the impeller is clogged or the suction line has an air leak. The pump motor runs, but no water discharges, so it seems to run constantly.
Check the discharge line for leaks. Also, inspect the impeller for debris. If the pump is old, it might be losing efficiency. A professional can test the pump and determine if it needs maintenance or replacement.
- Inspect the discharge line for leaks
- Clean the impeller
- Check the suction screen
- Verify the pump is fully submerged
- Listen for unusual noises
When to Call a Pro
If you've checked the basics and the pump still runs constantly, it's time to call a local water damage pro. They can perform a water damage inspection to identify the source of water and check the pump's condition. They can also recommend repairs or a new pump installation.
Constant running can lead to overheating and premature pump failure. It also wastes energy and may indicate a bigger drainage problem. A pro can provide a solution tailored to your home. In the meantime, keep the area dry and avoid standing water.
Talk to someone now
Call (614) 412-4391 any time, day or night, and describe what happened.
Call Now (614) 412-4391Frequently asked questions
Can a sump pump running constantly cause damage?
Yes, constant running can overheat the pump, leading to motor burnout. It also increases energy bills and may indicate a serious water intrusion issue. Addressing the cause early can prevent costly repairs.
How do I know if my sump pump is the problem?
Check if the pit is actually filling with water. If the pump runs but the pit stays dry, the issue is likely the float or check valve. If water is present, groundwater seepage is the culprit.
Can I fix a sump pump myself?
Simple fixes like cleaning the float or adjusting the tether are doable. But if you're not comfortable with electrical wiring or if the pump needs replacement, call a pro. Safety first.