Well Pump Noise: What Different Sounds Mean

Clicking Sounds

Normal Clicking

• Pressure switch clicks on/off
• Normal if happens occasionally
• When water use starts/stops

Rapid Clicking (Problem)

• Click-click-click every few seconds
• Pump cycling on/off rapidly
• Most common cause: Waterlogged tank

Waterlogged Tank Signs

• Rapid cycling
• Tank feels heavy/full
• No air cushion (check air charge)
• Solution: Recharge or replace tank

Relay Clicking

• In control box (3-wire systems)
• May indicate relay failure
• Or low voltage

What to Do

1. Note frequency of clicking
2. Check pressure tank air charge
3. Observe if pump runs briefly then stops
4. Call for service if rapid/continuous

Humming/Buzzing Sounds

Humming But Not Running

• Serious problem—turn off immediately
• Motor getting power but can't start
• Will burn out if left on

Possible Causes

• Seized pump: Bearings locked up
• Bad start capacitor: Motor can't start
• Low voltage: Not enough power
• Jammed impeller: Debris stuck
• Pump in sand: Impacted

Buzzing from Control Box

• Normal light buzz = contactor engaging
• Loud buzzing = problem (voltage, capacitor)
• Burning smell = urgent

What to Do

1. Turn off breaker immediately
2. Don't try to restart
3. Call professional
4. Running while stuck = motor damage

Grinding/Scraping Sounds

From Jet Pump

• Bearing wear
• Impeller rubbing
• Debris in pump
• Usually repairable

From Well (Submersible)

• You shouldn't hear submersible pump
• If you do: pump may be hitting casing
• Or severe wear
• Needs pulling and inspection

Sand in System

• Abrasive grinding sound
• Sand passing through impellers
• Indicates well producing sand
• Damages pump over time

What to Do

• Note when grinding occurs
• Check for sand in water
• Have system inspected

Other Noises

Banging/Hammering

• Water hammer: Pipes banging when pump stops
• Caused by sudden pressure change
• Solution: Hammer arrestor or check valve
• Can damage pipes if severe

Screaming/Squealing

• Bearing failure
• Belt slip (on old systems)
• Cavitation (pump running dry)
• Urgent—shut down

Gurgling from Faucets

• Air in system
• Drop in water level
• Pump sucking air
• Check well level

Vibrating Pipes

• Loose mounting
• Pressure too high
• Worn check valve
• Usually fixable above ground

Rumbling from Tank

• May be sediment buildup
• Or tank failure starting
• Have it inspected

Sound Location Guide

Frequently Asked Questions

Why is my well pump clicking?

Occasional click is normal (pressure switch). Rapid clicking = waterlogged tank or pressure problem. Check tank air charge.

Why is my well pump humming but not running?

Motor stuck—turn off immediately. Could be seized bearings, bad capacitor, or low voltage. Needs professional repair.

Should I hear my submersible pump?

No—submersible pumps are underwater and quiet. If you hear it, something's wrong (hitting casing, severe wear).

What causes water hammer?

Sudden stop of water flow causes pressure spike, makes pipes bang. Install hammer arrestor or soft-close check valve.

When should I call a professional?

Immediately if: humming but not running, burning smell, rapid clicking, no water. For occasional noises, note details and call during business hours.