Why Your Well Pump Runs Constantly (And Won't Shut Off)

Experiencing this problem right now? Call us for immediate assistance.

Call (760) 463-0493

If your well pump runs continuously without cycling off, something is preventing the system from reaching the shutoff pressure. This isn't just annoying—it dramatically shortens pump life, increases your electric bill, and can indicate serious problems in your water system. Here's what's likely happening and what you can do.

Common Causes

Waterlogged Pressure Tank: The most common cause. When the air bladder fails, the tank fills completely with water and can't maintain pressure, forcing the pump to run continuously.
Failed Pressure Switch: The switch that tells your pump when to start and stop may be stuck in the on position or have corroded contacts.
Water Leak in the System: A leak anywhere between the pump and your fixtures causes pressure to constantly drop, triggering the pump to run.
Running Fixtures: A stuck toilet fill valve, dripping outdoor faucet, or running irrigation system can cause continuous pump operation.
Undersized Pump: If your household demand exceeds pump capacity, it may never build enough pressure to trigger shutoff.
Check Valve Failure: A failed check valve allows water to flow backwards when the pump stops, draining pressure and triggering restart.

Warning Signs to Watch For

Pump motor runs without ever shutting off
Higher than normal electric bills
Pressure gauge needle bounces or never reaches cutoff pressure
Pump is hot to the touch
You hear water running even when nothing is turned on

How to Fix This Problem

1. Check for Running Water

Walk through your home and check every fixture. Listen for running toilets, check outdoor faucets, and verify irrigation systems are off. A single running toilet can keep a pump operating.

2. Test the Pressure Tank

Push the air valve on top of your pressure tank (like a tire valve). If water sprays out, the bladder has failed and the tank needs replacement. If it releases air, check the pressure—it should match your pump's cut-in pressure minus 2 PSI.

3. Inspect the Pressure Switch

Turn off power to the pump. Remove the pressure switch cover and look for burned contacts, insect nests, or corrosion. Clean contacts carefully with fine sandpaper.

4. Look for Visible Leaks

Check all visible pipes, especially at joints. Look for wet spots in your yard near the well or water line path to your house.

5. Call for Professional Diagnosis

If basic checks don't identify the problem, a well professional can pressure-test the system, check the pump amp draw, and identify hidden leaks.

When to Call a Professional

While some minor issues can be addressed by homeowners, well system problems often require professional diagnosis. Call Southern California Well Service if:

You're not comfortable working with electrical systems
The problem persists after basic troubleshooting
You notice multiple symptoms at once
Your well is over 10 years old and hasn't been serviced

We offer same-day emergency service throughout San Diego, Riverside, and San Bernardino counties.

Frequently Asked Questions

Is it bad for a well pump to run constantly?

Yes. Continuous operation overheats the motor, dramatically shortens pump lifespan, and increases electricity costs by 30-50%. Address the problem immediately.

How do I know if my well pressure tank is bad?

Check the air valve on top. Water spraying out indicates bladder failure. A tank that feels heavy all over (no air cushion) or makes sloshing sounds when rocked is likely waterlogged.

Can a bad pressure switch cause pump to run continuously?

Absolutely. A stuck or corroded pressure switch is one of the most common causes. The good news is switches are inexpensive ($20-50) and relatively easy to replace.

How much does it cost to replace a well pressure tank?

Tank replacement typically costs $300-800 including installation, depending on tank size. Most residential tanks are 20-40 gallons.

Need Help Now?

Southern California Well Service provides expert well pump repair and diagnostics. We've been solving well problems across Southern California since 2006.

Call (760) 463-0493 for Service