Updated April 2026

Well Pump Troubleshooting: 12 Symptoms Diagnosed (with Cost to Fix)

Most homeowners call a well pro before they have diagnosed the problem. A $30 pressure switch or a $350 pressure tank often fixes what looks like a $2,000 pump failure. Use this diagnostic guide to narrow the cause before agreeing to any repair.

The Most Expensive Misdiagnosis: Short Cycling

If your pump turns on and off every few seconds, check the pressure tank before anything else. Press the air valve (Schrader valve) on top of the tank. If water comes out, the bladder has failed. A pressure tank replacement costs $300 to $600. A pump replacement costs $1,000 to $3,000. The symptoms are nearly identical.

Pressure tank guide

Quick-Reference: All 12 Symptoms

Symptom	Most Likely Cause	Cost to Fix	DIY?
No water at all	Motor failure / dry well	$500 - $3,000	Hire pro
Low pressure	Worn impellers / pressure switch	$150 - $2,500	DIY pressure switch
Short cycling	Waterlogged pressure tank	$300 - $600	DIY tank replacement
Runs constantly	Pressure switch / drop pipe leak	$150 - $2,000	DIY switch only
Air / sputtering	Low well / check valve	$100 - $2,500	Hire pro
Sand in water	Pump position / casing crack	$500 - $5,000	Hire pro
Muddy water	Surface seal failure	$100 - $3,000	DIY well cap
Brown water	Iron / corroded pipe	$200 - $1,500	DIY filter
Rotten egg smell	Sulfur / bacteria	$50 - $1,500	DIY shock chlorination
Clicks, no water	Control box relay / voltage	$150 - $600	DIY relay (3-wire)
Gauge reads zero	Bad capacitor / broken pipe	$150 - $3,000	DIY capacitor only
Breaker trips	Shorted motor / ground fault	$200 - $3,000	Hire pro

Detailed Diagnosis by Symptom

1. No water at all

Critical

Most likely causes

Pump motor failed
Electrical fault (breaker, capacitor, control box)
Dry well or well drawdown
Check valve stuck closed
Broken or disconnected drop pipe

DIY diagnostic step

Check breaker first. Reset once. Listen for humming at pressure tank. Check pressure gauge reads zero.

Cost to fix

$200 to $3,000 depending on cause

Breaker reset: free. Capacitor: $50 to $150 DIY. Pump replacement: hire a pro.

When to hire a pro

Any symptom beyond a breaker check or capacitor swap on a 2-wire system.

2. Low pressure throughout the house

High

Most likely causes

Partially failed pump motor
Worn impellers
Pressure switch set too low
Partially blocked drop pipe
Clogged sediment filter on the house side

DIY diagnostic step

Check pressure gauge reading. Verify pressure switch cut-in and cut-out settings. Replace in-line sediment filter.

Cost to fix

$150 to $2,500

Pressure switch adjustment or replacement: $30 to $150 DIY. Sediment filter: $20 to $80.

When to hire a pro

Worn pump or impellers require professional pull and replacement.

3. Short cycling (pump kicks every few seconds)

High

Most likely causes

Waterlogged pressure tank (most common)
Pressure tank air charge low
Pressure switch set too close together (narrow band)

DIY diagnostic step

Press Schrader valve on tank. Water out = failed bladder. Air out = check pressure setting.

Cost to fix

$300 to $600 for pressure tank; $30 to $80 for air recharge

Adding air charge: free with a bicycle pump. Tank replacement: realistic DIY project.

When to hire a pro

If replacing the tank does not stop the cycling, the pressure switch may need recalibration.

4. Pump runs constantly and never shuts off

High

Most likely causes

Pressure switch failed (stuck open)
Leak in the drop pipe
Pump too small for demand
Low well yield (pump outrunning the aquifer)

DIY diagnostic step

Close all fixtures. If pressure still does not reach cut-out, suspect pressure switch or drop pipe leak.

Cost to fix

$150 to $600 for switch; $400 to $2,000 for drop pipe repair; pump upsizing up to $2,500

Pressure switch replacement: $30 to $80 DIY with power off.

When to hire a pro

Drop pipe leak diagnosis and repair requires pulling the pump.

5. Air / sputtering from faucets

Medium

Most likely causes

Low well water level (pump sucking air)
Crack in drop pipe allowing air intrusion
Check valve failure allowing air back-siphoning

DIY diagnostic step

Note whether sputtering occurs only after periods of non-use or constantly.

Cost to fix

$100 to $2,500

Check valve replacement: $50 to $150 with pump pull.

When to hire a pro

Drop pipe inspection requires a professional pull. Low well yield may need a hydrogeological assessment.

6. Sand in water

Medium

Most likely causes

Pump set too close to well bottom
Failed well screen
Cracked well casing allowing sand intrusion
Pump over-drawing the well

DIY diagnostic step

Let a glass of water settle. Sand visible? Feel for grit. Note whether it is fine sand (casing) or coarse (pump position).

Cost to fix

$500 to $5,000 depending on cause

Install a sediment filter to protect plumbing while investigating. Cost: $80 to $250.

When to hire a pro

Pump repositioning and casing inspection require professional pull.

7. Muddy or cloudy water

High

Most likely causes

Surface water infiltration (failed well cap or casing seal)
After a heavy rain: compromised surface seal
Disturbed sediment from a pump pull

DIY diagnostic step

Run water for 10 minutes. If cloudiness clears, it was disturbed sediment. If it persists after rain, suspect seal failure.

Cost to fix

$100 to $3,000

New well cap: $20 to $100 installed. DIY-friendly.

When to hire a pro

Casing grouting or casing repair requires a licensed well contractor.

8. Brown water (rust / iron)

Medium

Most likely causes

High iron content in the aquifer (natural)
Corroding galvanized drop pipe
Corroding pressure tank

DIY diagnostic step

Run cold water from a glass. Compare to untreated cold tap. If brown only on hot side, water heater is the source.

Cost to fix

$0 to $1,500

An iron filter or whole-house sediment filter handles iron content. Cost $200 to $800 DIY.

When to hire a pro

Corroded galvanized pipe requires a professional pump pull and pipe replacement.

9. Rotten egg smell (sulfur / hydrogen sulfide)

Medium

Most likely causes

Naturally occurring hydrogen sulfide in the aquifer
Bacteria in pressure tank or water heater
Poorly vented well

DIY diagnostic step

Run water for 2 minutes from well tap only (bypass softener). Smell at cold vs hot taps separately.

Cost to fix

$200 to $1,500 for treatment; $0 if natural and already filtered

Shock chlorination of the well: $50 to $100 DIY. Chlorination kit and instructions available from county extension offices.

When to hire a pro

Persistent or strong odor requires water testing and potentially a continuous injection treatment system.

10. Pump clicks but no water

High

Most likely causes

Pressure switch chattering due to low voltage
Pump drawing water but losing prime on a jet system
Relay contacts burned in control box (3-wire system)

DIY diagnostic step

Listen: fast clicking is a relay. Slow click-pause-click is a pressure switch hunting. Check voltage at the pump circuit under load.

Cost to fix

$150 to $600

Control box relay replacement on a 3-wire system: $150 to $300 DIY if comfortable with electrical work.

When to hire a pro

Voltage issues require an electrician. Jet pump prime loss requires professional diagnosis.

11. Pressure gauge reads zero with pump on

Critical

Most likely causes

Pump motor running but not turning impeller (bad capacitor or burned motor)
Blocked impeller
Disconnected drop pipe inside the well

DIY diagnostic step

Verify the pump has power. If motor hums but no water flows and gauge stays at zero, the motor is running without pumping.

Cost to fix

$150 to $3,000

Capacitor replacement (2-wire systems): $50 to $150 DIY. Motor or pump body failure: hire a pro.

When to hire a pro

Any job requiring a pump pull is a professional task for deep submersibles.

12. Breaker trips when pump runs

Critical

Most likely causes

Pump motor winding shorted (drawing excessive current)
Undersized wire gauge causing overload
Ground fault in the pump cable
Failing start capacitor (2-wire pump)

DIY diagnostic step

Reset once. If it trips again immediately, do not reset again. Note whether trip happens at startup or after running.

Cost to fix

$200 to $3,000

Capacitor replacement: $50 to $150. Wire gauge inspection: visual only, no DIY repair on pump cable inside the well.

When to hire a pro

Any shorted motor or ground fault in the drop pipe requires professional diagnosis and pump pull.

Frequently Asked Questions

Why is my well pump running but no water is coming out?

If the pump is running but no water flows, the most likely causes are: (1) the pump has lost prime in a jet pump system, (2) the pressure switch is faulty and energizing the pump but the motor has failed, (3) the check valve has failed, or (4) the drop pipe has a break inside the well. Check the pressure gauge first. If pressure reads zero while the pump runs, the pump is energized but not moving water.

Why does my well pump short cycle?

Short cycling is almost always caused by a waterlogged pressure tank. When the tank bladder fails, the tank fills completely with water and loses its air cushion. The pump fills it in seconds, pressure trips the cutoff, then drops immediately when a faucet opens. A pressure tank replacement at $300 to $600 fixes this in most cases. Check the air valve on top of the tank: if water comes out instead of air, the bladder has failed.

What causes sand in well water?

Sand in the water typically means the pump is positioned too close to the bottom of the well and is sucking sand, the well screen or casing has a crack allowing sediment intrusion, or the pump was oversized and is pulling water faster than the well can naturally filter. Have a well professional check the pump setting depth and well screen condition. A whole-house sediment filter can protect your plumbing while the root cause is investigated.

Pressure Tank

Most common misdiagnosis

Warning Signs

Severity-rated failure signs

Repair vs Replace

When to fix vs replace

DIY vs Pro

What you can fix yourself

If sand or sediment is getting into your water, a whole-house filter may be the next step. See BestWholeHouseWaterFilter.com for filter comparisons.