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Fix a well pump that cycles

We'll check the pressure tank, pressure switch, and for leaks—then fix or replace the faulty part—or tell you when to call a pro.

Troubleshooting · Home maintenance
15–45 min
What you'll need
  • Tire pressure gauge and air pump (for tank)
  • Wrench set
  • Replacement pressure switch or tank (if tests show a fault)
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Steps

Goal: Confirm the symptom, check the pressure tank, pressure switch, and for leaks—then fix or replace.

  • Turn on a faucet and listen at the pressure tank. If the pump starts, runs briefly, stops, then starts again within seconds, it is short cycling.
  • Good: Pump cycles frequently. Proceed to Check pressure tank.
  • Bad: Pump runs a minute or more—normal; different problem. See When to get help.

Check pressure tank

Goal: Rule out a waterlogged pressure tank.

  • Shut off power to the pump. Drain the pressure tank completely. Add air via the Schrader valve until pressure matches cut-in minus 2 psi. Turn power on.
  • Good: Tank holds air, pump runs longer between cycles.
  • Bad: Tank fills with water immediately or will not hold air—bladder failed. Replace the tank.

Check pressure switch

Goal: Confirm the pressure switch has adequate differential.

  • Check the pressure switch cut-in and cut-out settings. The differential should be at least 20 psi. Adjust per the manufacturer if too narrow. Replace if contacts chatter.
  • Good: Differential is 20+ psi, switch activates smoothly.
  • Bad: Still cycles after adjustment—check for leaks.

Check for leaks

Goal: Find and fix leaks that drop pressure quickly.

  • Check visible pipes, fittings, fixtures, and tank connections for drips. Fix any leaks.
  • Good: No leaks found, cycling should improve.
  • Bad: Suspect leak in well or buried pipe—call a pro.

When to get help

Call a well or pump professional if:

  • The pressure tank will not hold air (bladder failed).
  • You have adjusted the pressure switch and it still cycles.
  • You suspect a leak in the well or buried pipe.
  • You are not comfortable with plumbing or electrical work.

Verification

  • The pump runs for at least 30–60 seconds when you use water before shutting off.
  • The pressure switch differential is at least 20 psi.
  • The pressure tank holds air and provides adequate drawdown.
  • No visible leaks in the system.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Confirm symptom Verify the pump turns on and off frequently when using water.
  2. Check pressure tank Drain tank, add air; replace if bladder has failed.
  3. Check pressure switch Adjust differential or replace if faulty.
  4. Check for leaks Fix any leaks that drop pressure quickly.
  5. Call a pro Tank will not hold air, buried leak suspected, or not comfortable—call a well professional.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Pressure tank size and age
  • Pressure switch cut-in and cut-out settings
  • Whether the tank holds air after adding
  • Any visible leaks
  • Steps already tried

Does the pump turn on and off frequently when you use water?

Listen at the pressure tank. Short cycling means the pump starts, runs briefly, stops, then starts again within seconds.

Turn on a faucet. Listen for pump cycles. Good: pump cycles every few seconds—short cycling. Bad: pump runs a minute or more—normal; different problem.

Yes No

You can change your answer later.

Does the pressure tank hold air?

A waterlogged tank has no air cushion. Drain the tank, add air, and check if it holds.

Shut off power. Drain the tank. Add air to match cut-in minus 2 psi. Turn power on. Holds air: tank good—check pressure switch. Loses air or fills with water: bladder failed—replace tank.

Yes No (waterlogged)

You can change your answer later.

Replace pressure tank

Replace the pressure tank with one sized for your pump. A failed bladder can not be repaired.

Done

Is the pressure switch differential at least 20 psi?

Cut-out minus cut-in should be 20 psi or more. Too-narrow differential causes cycling.

Check pressure switch settings. Adjust the differential nut per manufacturer. Confirm cut-out minus cut-in is at least 20 psi. Replace switch if contacts chatter. Good: 20+ psi differential. Bad: still cycles—check for leaks.

Yes No

You can change your answer later.

Adjust pressure switch and test

Adjust the pressure switch differential per the manufacturer. Test. The pump should run longer between cycles.

Done

Are there any leaks in the system?

Leaks drop pressure quickly and trigger the pump.

Check pipes, fittings, and fixtures for drips. Check tank connections. Fix any leaks. Good: no leaks, cycling should improve. Bad: leak in well or buried pipe—call a pro.

Yes No

You can change your answer later.

Cycling should improve

With tank air, switch adjustment, and no leaks, the pump should run longer between cycles.

Done

Call a well professional

Call a well or pump professional if the tank will not hold air, you have adjusted the switch and it still cycles, you suspect a buried leak, or you are not comfortable with plumbing or electrical work.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a well pump cycle on and off?
Common causes: waterlogged pressure tank (no air cushion), pressure switch with too-narrow differential, or a leak that drops pressure quickly. The tank bladder can fail over time, leaving no air to absorb pump pulses.
Can I fix a cycling well pump myself?
Yes, for tank air and pressure switch adjustment. You can drain the tank and add air, or adjust the switch differential. Tank replacement or well work often needs a professional.
When should I call a pro for a cycling well pump?
Call a well professional if the tank will not hold air (bladder failed), you have tried adjustments and it still cycles, or you are not comfortable with plumbing or electrical work.

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