When a well pump keeps running non-stop, it’s more than just a small annoyance. It’s a sign that your well pump system may have a serious problem. Whether it’s a leak in a water line, a pressure control switch set incorrectly, or a pressure tank issue, constant operation can quickly lead to higher bills, pump damage, and even loss of water.
A healthy pump system cycles on and off as needed to maintain consistent water pressure. If your pump runs without stopping, it means the system can’t reach the shut-off point. This could be because it’s losing pressure, the switch that controls it is faulty, or the pump is trying to pull water but can’t because of a drop in water level. In this guide, you’ll learn the most common reasons for a constantly running pump, safe ways to troubleshoot, what repairs might cost, and how to keep your system running smoothly for years to come.
Why a Well Pump Keeps Running Constantly
A well pump works by drawing water through the intake pipe into your home and storing it in a tank. A pressure control mechanism turns the pump on when air pressure inside the tank drops and off when it reaches the proper range.
When the pump runs without stopping, it’s often because:
- A leak in the pipe or plumbing fixture is allowing water to escape, so the pump never gets the chance to stop running.
- The pressure control switch is damaged or set incorrectly, failing to signal the pump to shut off.
- The water level in your well is too low, causing the pump to lose prime or struggle to meet demand.
Left unresolved, these issues can cause the pump motor to overheat, wear out prematurely, and even lead to a full system failure.
Common Causes of a Constantly Running Well Pump
If your well pump keeps running, it means the system can’t reach the shut-off point. This often happens due to leaks, faulty parts, or changes in your water level. Below are the most common issues that lead to a constantly running pump.
Leaks in Plumbing or Fixtures
Even a small leak in a pipe, toilet, or faucet can make your pump rely on constant cycling to replace lost water. A slow leak can be just as damaging as a large one because it forces the pump to keep working.
Signs include:
- Damp areas on the ground near buried lines
- The sound of water running when no fixtures are on
- An unexplained increase in your water bill
If a hose bib or tap is left open, the pump will keep trying to maintain pressure, running up energy costs.
Faulty Pressure Control Switch
The pressure control switch is a small but critical component in your well pump system. It monitors the gauge reading and turns the pump on or off depending on the air pressure in the tank. When the switch is worn, corroded, or set incorrectly, the pump may run endlessly. It can also fail if assembly connections are loose, power contacts are burned, or the diaphragm inside is damaged.
Loss of Prime in the Pump System
If your pump can’t pull water because of a suction issue, it’s said to have lost prime. This is common in jet pumps and can happen if:
- There’s a block or crack in the intake pipe
- The water level has dropped too low
- The priming port was not sealed properly after service
Without water inside to cool it, the pump may overheat and become damaged.
Low Water Level in the Well
If the water level in your well drops below the pump intake, it will run constantly but never reach the cut-off pressure. This can happen during drought, heavy irrigation nearby, or if your house is drawing more water than usual.
Pressure Tank Problems
Your pressure tank stores water and keeps the pump from cycling too often. Inside is an air bladder that maintains air pressure against the water. If the bladder ruptures, pressure drops rapidly after every use, triggering the pump to start again. Symptoms include rapid cycling, fluctuating water pressure, and the pump running longer than it should.
Step-by-Step Troubleshooting for Homeowners
If your pump is running constantly, here are safe checks to do before calling for repair:
- Shut off all fixtures in the house and listen to see if the pump stops. If not, you likely have a leak or switch issue.
- Check the pressure gauge. A low reading despite the pump running suggests a drop in water level or a leak.
- Inspect the pressure control switch for corrosion, dirt, or loose wires.
- Look for visible leaks in pipes, the tank, or around fixture connections.
If these steps don’t reveal the cause, it’s best to call a professional with proper access to test your system safely.
Cost of Fixing a Well Pump That Runs Constantly
| Problem | Estimated Repair Cost |
|---|---|
| Pressure control switch replacement | $75 – $200 |
| Leak repair in water line or pipe | $150 – $600 |
| Pressure tank replacement | $800 – $1,500 |
| Pump replacement | $1,000 – $2,500+ |
The solution might be as simple as tightening a fitting or as involved as replacing the entire pump assembly. Prompt action saves both power and repair expenses.
Preventing Your Well Pump from Running Constantly
To avoid another constantly running pump, follow a basic maintenance schedule:
- Test your pressure gauge and pressure control annually.
- Inspect your tank, pipes, and fixtures for early signs of wear.
- Keep priming ports sealed after service to prevent suction leaks.
- Address any water running sounds immediately, and it’s often a hidden fixture leak.
According to the EPA’s Private Well Maintenance Guide, proper maintenance can help prevent issues where a well pump keeps running. Regular inspections, timely repairs, and water quality testing all contribute to keeping the system efficient and reliable.
Conclusion
A well pump that keeps running is a problem you should never ignore. From small leaks to more serious issues like low water level or a failing pressure tank, constant operation can quickly wear out your pump system and lead to costly repairs. By knowing the common causes, performing safe troubleshooting steps, and scheduling regular maintenance, you can keep your well pump system efficient, extend its lifespan, and avoid unexpected breakdowns.
At Housatonic Valley Well Pump, our licensed technicians are ready to help if you’re dealing with low water pressure, no water, or other signs of well pump trouble. We’ll inspect your system, pinpoint the cause, and provide fast, effective repairs to get your water flowing again. Contact us today for dependable well pump repair and maintenance you can trust.
FAQs
What to do if the water pump keeps running?
First, shut off all water usage and see if the pump stops. Check for visible leaks, verify the pressure gauge reading, and inspect the pressure switch for signs of damage. If the pump continues to run despite no water usage, call a well service professional to avoid further damage.
Why does my well pump run when no water is being used?
This usually means water is escaping somewhere in the system, such as through a leak or faulty check valve. The pump senses the pressure drop and keeps running to compensate. Even small leaks can cause continuous cycling, so it’s important to have the system inspected.
Why would a well pump not shut off?
A pump that won’t turn off often points to issues with the pressure switch, a leak, or low water levels. Mechanical wear inside the pump can also reduce efficiency and cause constant operation. Addressing the root cause promptly can prevent costly damage.
How long can a well pump run continuously?
Most pumps are designed to run for short cycles, not constantly. Running continuously for hours or days can overheat the motor and cause premature failure. If your pump runs non-stop, it should be shut down and inspected as soon as possible.