What are the signs of a bad well pump?

The most common signs of a bad well pump include: no water or very low water pressure, the pump running constantly without shutting off, frequent breaker trips, strange noises from the well or pump area, air or sputtering in the water, dirty or sandy water, unusually high electricity bills, pressure that fluctuates wildly, and the pump taking a long time to build pressure. Any of these symptoms warrant investigation by a professional.

How long do well pumps typically last?

Submersible well pumps typically last 8-15 years, with an average lifespan of about 10-12 years. Jet pumps may last slightly longer since they're above ground and easier to maintain. Factors that affect pump lifespan include water quality (sand or minerals cause faster wear), how often the pump cycles, whether surge protection is installed, and whether the pump has run dry. Regular maintenance can extend pump life.

Can a well pump fail suddenly without warning?

Yes, well pumps can fail suddenly, especially due to electrical problems like lightning strikes, power surges, or capacitor failure. However, most pump failures give warning signs weeks or months before complete failure—things like decreasing water pressure, increased cycling, or unusual sounds. The key is recognizing these signs and addressing them before you're left without water.

Why does my well pump run but produce no water?

When a pump runs but produces no water, possible causes include: the well has run dry (pump is below water level), severely worn impellers that can't lift water, a broken shaft inside the pump, a major leak in the drop pipe, a failed check valve allowing water to drain back, or the pump has become clogged with sand or debris. This situation requires professional diagnosis to determine the exact cause.

How can I test if my well pump is working properly?

Basic tests you can do: Watch the pressure gauge while using water—it should stay between 40-60 PSI. Listen for the pump cycling—it should run for at least a minute between cycles. Check water flow at multiple fixtures. Note any sputtering, air, or discoloration. For accurate diagnosis, a professional can perform amp tests, pressure tests, and a megger test to check motor insulation.

Is it worth repairing a well pump or should I replace it?

For submersible pumps, replacement is usually better than repair because the pump must be pulled from the well either way—a significant cost. If you're already paying for a pump pull ($800-$1,500), installing a new pump adds relatively little extra cost and gives you a fresh warranty and many more years of service. Exceptions include above-ground components like control boxes or capacitors, which are worth repairing.

What causes a well pump to fail prematurely?

Common causes of premature pump failure include: running dry due to low water level, short-cycling from a waterlogged pressure tank, power surges from lightning, sand or sediment wearing out impellers, mineral scale buildup, incorrect pump sizing, and lack of maintenance. Protecting against these factors can significantly extend pump life.

How much does it cost to diagnose and replace a bad well pump?

A diagnostic service call typically costs $75-$150 and identifies the problem. If pump replacement is needed, total cost depends on well depth and pump size: shallow wells (under 100 feet) typically cost $1,500-$2,500, medium depth (100-300 feet) costs $2,000-$3,500, and deep wells (300+ feet) can cost $3,500-$5,000 or more. This includes the pump, labor, and materials.

7 Signs Your Well Pump Is Going Bad (Don't Ignore #3)

Is your well pump going bad? Recognizing the warning signs early can mean the difference between scheduling a convenient repair and waking up to no water on a Monday morning. A failing pump often sends signals weeks or even months before complete failure—if you know what to look for.

How to tell if your well pump is bad involves watching for changes in water pressure, unusual sounds, electrical issues, and water quality problems. In this comprehensive guide, we'll walk you through 12 warning signs that indicate pump trouble, explain what each symptom means, and help you decide when it's time to call for professional diagnosis.

As San Diego County's trusted well service company with 30+ years of experience, we've diagnosed thousands of pump problems. Here's what we've learned about recognizing a bad well pump.

🔍 Quick Assessment

If you're experiencing any of these, your pump may be failing:

No water at all, or extremely low pressure
Pump runs constantly without shutting off
Circuit breaker trips repeatedly
Strange sounds from well area
Electricity bill has increased significantly

Need immediate help? Call (760) 440-8520

How Long Do Well Pumps Last?

Before discussing signs of failure, it helps to know what to expect from your pump's lifespan:

Pump Type	Average Lifespan	With Good Care
Submersible pump	8-15 years	Up to 20 years
Jet pump (shallow well)	10-15 years	Up to 20+ years
Jet pump (deep well)	8-12 years	Up to 15 years

If your pump is approaching or exceeding these ages, pay extra attention to the warning signs below. Learn more about different types of well pumps and their characteristics.

The 12 Warning Signs of a Bad Well Pump

No Water or Complete Loss of Pressure

The most obvious sign—you turn on the faucet and nothing comes out, or the flow is so weak it's barely usable. This could indicate the pump has stopped working entirely.

What It Might Mean:

Pump motor has failed
Electrical problem (breaker, wiring, control box)
Pump impellers are severely worn
Well has run dry

What to Do:

Check if the breaker has tripped. If not, and there's no water, call for professional diagnosis. See our no water troubleshooting guide.

Pump Runs Constantly Without Shutting Off

A healthy pump should cycle—run to build pressure, then shut off until pressure drops. A pump that never shuts off is working overtime and wearing itself out.

What It Might Mean:

Leak in the system preventing pressure build-up
Pressure switch stuck or faulty
Worn pump can't build enough pressure
Well can't supply water fast enough

Why It's Urgent:

Continuous running causes motor overheating and rapid wear. It also dramatically increases electricity costs. Don't ignore this sign.

Circuit Breaker Trips Repeatedly

If your well pump keeps tripping the breaker, the pump is drawing too much electricity—a sign of motor problems or electrical faults.

What It Might Mean:

Motor windings are shorting out
Water has entered the motor
Pump is seized or bound
Damaged wiring

Safety Warning:

Do NOT keep resetting a breaker that trips repeatedly. This is a fire hazard. Leave it off and call for service.

Rapid Cycling (Short Cycling)

Short cycling is when the pump turns on and off every few seconds or minutes instead of running for longer periods. This is one of the most damaging conditions for a pump motor.

What It Might Mean:

Waterlogged pressure tank
Pressure switch needs adjustment
Small leak in plumbing
Check valve failing

Why It's Serious:

Each start-up stresses the motor. A pump designed to cycle 10 times per hour might cycle 100+ times when short-cycling—wearing it out in months instead of years.

Strange Noises

Unusual sounds from your well pump area often indicate mechanical problems. With submersible pumps, you might hear sounds transmitted through the pipes.

Sound Types:

Clicking: Pressure switch or relay problem
Humming: Pump trying to start but can't
Grinding: Bearing or sand damage
Hammering: Check valve or water hammer

What to Do:

New or changing sounds deserve attention. Try to describe when the sound occurs (startup, running, shutdown) to help technicians diagnose.

Air Sputtering From Faucets

When faucets sputter and spit air mixed with water, it often indicates pump or well problems. See our guide on sputtering well water for details.

What It Might Mean:

Dropping water level in well
Crack or leak in drop pipe
Failing pump seals
Methane or gases in water

Why It Matters:

Air in the system can cause pump cavitation (running with air pockets), which damages impellers. It also indicates the pump may be running dry at times.

Decreased Water Pressure Over Time

If water pressure has been gradually declining over months or years, pump wear is a likely culprit—especially in wells with sand or sediment.

What It Might Mean:

Pump impellers worn by sand/sediment
Motor losing power as it ages
Scale buildup inside pump
Declining well yield (may not be pump)

Diagnosis:

A professional inspection can determine if it's the pump, the well, or another component causing the gradual decline.

Fluctuating Water Pressure

When pressure drops then comes back, or surges unexpectedly, your pump or pressure system is struggling to maintain consistency.

What It Might Mean:

Pressure tank problems
Pump having intermittent issues
Well yield fluctuation
Pressure switch malfunction

Pay Attention To:

Note when fluctuations occur—during high usage only? Randomly? Always at the same time? This information helps diagnosis.

Dirty, Sandy, or Discolored Water

A sudden change in water clarity or color can indicate pump problems—or the beginnings of pump problems.

What It Might Mean:

Pump sitting lower in well, pulling sediment
Screen damage letting in sand
Well casing deterioration
Pump about to fail (stirring sediment)

Why It Matters:

Sand destroys pump impellers rapidly. If you're seeing sand in your water, the pump may already be damaged and is likely to fail soon.

Unusually High Electricity Bills

A sudden spike in electricity costs—especially if other factors haven't changed—can indicate your well pump is working harder than it should.

What It Might Mean:

Pump running more often (short-cycling)
Motor working harder due to wear
Pump running against closed valve
System leak causing constant running

What to Check:

Compare current electricity usage to previous years. If your water bill or well pump hours show significant increases, investigate before the pump fails completely.

How to Tell If Your Well Pump Is Bad: 12 Warning Signs

🔍 Quick Assessment

How Long Do Well Pumps Last?

The 12 Warning Signs of a Bad Well Pump

No Water or Complete Loss of Pressure

What It Might Mean:

What to Do:

Pump Runs Constantly Without Shutting Off

What It Might Mean:

Why It's Urgent:

Circuit Breaker Trips Repeatedly

What It Might Mean:

Safety Warning:

Rapid Cycling (Short Cycling)

What It Might Mean:

Why It's Serious:

Strange Noises

Sound Types:

What to Do:

Air Sputtering From Faucets

What It Might Mean:

Why It Matters:

Decreased Water Pressure Over Time

What It Might Mean:

Diagnosis:

Fluctuating Water Pressure

What It Might Mean:

Pay Attention To:

Dirty, Sandy, or Discolored Water

What It Might Mean:

Why It Matters:

Unusually High Electricity Bills

What It Might Mean:

What to Check:

Related Articles

Signs Your Well Pump Is Failing

Low Water Pressure From Well

Well Maintenance Guide

Need Help With Your Well?