Why Does My Ejector Pump Keep Running? Causes and Solutions
An ejector pump that keeps running can be more than an annoying plumbing issue. It may indicate a stuck float switch, a problem with the pump's discharge line, a malfunctioning check valve, or an ongoing wastewater flow issue. If the pump cannot shut off normally, it may experience unnecessary wear and eventually stop working when your home needs it most.
Sewage ejector pumps help move wastewater from basement bathrooms, laundry areas, and other plumbing fixtures to the home's main drain system when gravity alone cannot move it effectively. When the pump runs longer than usual or never shuts off, identifying the cause early can help prevent a larger plumbing problem.
In this guide, you'll learn why an ejector pump keeps running, what warning signs to watch for, and when to contact a professional plumber.
Also Read: Best Licensed Plumber in DuPage County, IL: How to Choose the Right Local Plumber
How Does a Sewage Ejector Pump Work?
A sewage ejector pump collects wastewater in a sealed basin and pumps it through a discharge pipe toward the home's drainage system. A float switch typically activates the pump when wastewater reaches a certain level and turns it off after the water level drops.
When everything works correctly, the pump runs only when needed. If the float switch fails, wastewater continues entering the basin, or the pump cannot discharge water properly, it may run longer than normal or fail to shut off.
Understanding how the system operates makes it easier to recognize when something is wrong.
Ejector Pump Keeps Running? Get Professional Help
Is your ejector pump running nonstop? Get professional help to identify the cause and restore reliable operation.
7 Reasons Your Ejector Pump Keeps Running
1. The Float Switch Is Stuck or Malfunctioning
A faulty float switch is one of the common reasons an ejector pump keeps running. The float detects the wastewater level and signals the pump when to start or stop.
If the float becomes stuck, tangled, obstructed, or damaged, it may continue signaling the pump to operate even after the basin's water level has dropped.
Warning signs include:
- The pump continues running after wastewater has been discharged.
- The pump starts and stops irregularly.
- The pump runs even when there has been little recent water use.
A damaged or incorrectly positioned float may require adjustment or replacement. Because ejector pump basins can contain sewage and hazardous gases, avoid opening the basin or reaching inside to inspect the float yourself.
2. The Check Valve Is Not Working Properly
A check valve helps prevent wastewater in the discharge pipe from flowing backward into the ejector pump basin after the pump shuts off.
If the valve is worn, damaged, or unable to close properly, some discharged wastewater may flow back into the basin. The pump may then activate again, creating repeated cycles or making it appear that the pump never finishes its job.
Possible warning signs include:
- The pump starts again shortly after stopping.
- You hear repeated cycling or unusual pipe noises.
- The pump runs more frequently than it normally does.
A plumber can inspect the check valve and related discharge components to determine whether repair or replacement is necessary.
3. The Discharge Pipe Is Blocked or Restricted
The discharge line carries wastewater away from the basin. If the line becomes obstructed, the pump may struggle to move wastewater out efficiently.
Restrictions can result from buildup, debris, damaged piping, or other discharge problems. The pump may continue running because the wastewater level is not dropping as expected.
Signs of a possible discharge problem include prolonged operation, unusual noises, and wastewater levels that do not appear to decrease normally.
Do not attempt to dismantle the discharge line or open the sewage basin without the proper equipment and training. A professional can check for restrictions and confirm that wastewater is being discharged correctly.
4. Too Much Wastewater Is Entering the Basin
Sometimes the pump itself is not the main problem. Excessive wastewater entering the basin can cause it to run more frequently or for longer periods.
This may happen when several plumbing fixtures are being used at once or when a plumbing fixture continues discharging water because of a separate problem.
If the pump runs continuously even when household water use is low, a plumber may need to investigate whether wastewater is entering the basin unexpectedly or whether another component is malfunctioning.
Also Read: Top 5 Plumbing Service Calls and How to Prevent Them
5. The Ejector Pump Is Worn or Damaged
Like other mechanical equipment, an ejector pump can wear out over time. A damaged motor, worn internal components, or reduced pumping performance can prevent the system from removing wastewater as efficiently as it should.
A worn pump may run for extended periods without lowering the basin level properly. You might also notice unusual humming, grinding, or other changes in operating noise.
A professional inspection can help determine whether the pump can be repaired or whether replacement is the more practical long-term solution.
If you notice burning smells, smoke, or signs of overheating, stop using the affected system if it is safe to do so and seek professional assistance. Do not touch wet electrical equipment.
6. The Pump Is Not Moving Wastewater Efficiently
An ejector pump may run longer than normal if it is unable to move wastewater through the discharge system at its expected rate.
Possible causes include a restricted discharge line, a check valve problem, an improperly functioning pump, or a system component that needs attention.
If the pump continues operating but the wastewater level does not appear to fall, avoid repeatedly restarting it or attempting repairs without knowing the cause. Continued operation may increase wear on the equipment.
A plumber can test the pump and inspect the discharge system to identify the source of the problem.
7. The Pump Is Incorrectly Sized or the System Has an Installation Issue
In some cases, recurring operation may be related to the pump's capacity or the way the system was installed.
A pump that is not suited to the home's wastewater demands may struggle to keep up. Incorrect installation, unsuitable controls, or discharge-system issues can also contribute to poor performance.
If the pump has run excessively since it was installed, or the problem continues after repairs, ask a plumber to assess the overall system rather than replacing individual parts without confirming the cause.
Get Reliable Ejector Pump Repair
Experiencing ejector pump problems at home? Dream Home Plumbing can assess the issue and recommend the right repair solution.
Is It Normal for an Ejector Pump to Run Frequently?
An ejector pump should run when wastewater reaches its activation level. The exact frequency and runtime depend on the basin size, pump capacity, plumbing usage, and system design.
Occasional operation is normal. Continuous operation, unusually long cycles, or repeated cycling without an obvious reason should be investigated.
Pay attention to changes in the pump's normal behavior, particularly if it runs when no one is using water, makes unfamiliar noises, or fails to shut off.
What Should You Do When Your Ejector Pump Won't Shut Off?
If your ejector pump keeps running, take these precautions while arranging an inspection.
1. Reduce unnecessary water use. Avoid using basement sinks, toilets, showers, washing machines, or other fixtures connected to the affected system until the problem is assessed. This can help limit additional wastewater entering the basin.
2. Listen for changes in operation. Note whether the pump produces humming, grinding, repeated clicking, or other unusual sounds. This information can help a plumber narrow down the issue.
3. Watch for warning signs from a safe distance. Sewage odors, visible wastewater, damp flooring, or signs of an overflowing basin may indicate a more urgent problem. Do not open the basin to investigate.
4. Avoid repeated resets or DIY repairs. Repeatedly restarting a malfunctioning pump may worsen the problem. Do not reach into the basin, handle sewage, or touch electrical equipment in wet conditions.
5. Arrange professional inspection. A qualified plumber can evaluate the float switch, check valve, discharge line, pump condition, and other system components to identify why the pump is not shutting off.
If sewage is backing up or overflowing, stop using connected fixtures and seek prompt professional help.
Can a Constantly Running Ejector Pump Increase Repair Costs?
Yes. A pump that continues running unnecessarily may experience additional motor wear and consume electricity without resolving the underlying issue. If the problem is left unresolved, it may eventually lead to pump failure or a wastewater backup.
The actual repair cost depends on the cause. A float switch or check valve issue may require a different repair than a damaged pump or a blocked discharge line.
An inspection helps identify the specific fault before deciding whether a component repair, a more extensive repair, or a complete pump replacement is appropriate.
Repair or Replace Your Ejector Pump?
Not sure whether your ejector pump needs repair or replacement? Schedule a professional inspection to determine the best option.
Ejector Pump Repair in DuPage County, IL
A malfunctioning ejector pump can disrupt the use of a basement bathroom, laundry area, or other plumbing fixtures connected to the wastewater system. Prompt attention can help restore normal operation and reduce the risk of a sewage backup.
Dream Home Plumbing Co. serves homeowners in Glen Ellyn and communities throughout DuPage County, IL. If your pump keeps running, makes unusual noises, or struggles to move wastewater, our team can assess the problem and recommend an appropriate solution.
Explore our ejector pump repair and installation services to find the right next step for your home's plumbing system.
You can also visit our existing guide to common ejector pump issues and when repairs are needed for additional information about related warning signs.
For homeowners experiencing a broader plumbing emergency, our emergency plumbing guide for DuPage County explains when a plumbing issue needs prompt professional attention.
Conclusion
When an ejector pump keeps running, the cause may be a stuck float switch, a faulty check valve, a restricted discharge line, excessive wastewater entering the basin, or a worn pump. Ignoring the issue can lead to unnecessary equipment wear and may increase the risk of wastewater backup.
Pay attention to changes in pump operation, reduce unnecessary water use if the system is malfunctioning, and avoid opening the sewage basin or handling electrical components yourself. A professional inspection can help identify the cause and determine the appropriate repair.
For dependable help with ejector pump problems and other residential plumbing services in DuPage County, IL, contact Dream Home Plumbing to discuss your plumbing concerns and arrange the appropriate service.
