Well Pump Repair: Troubleshooting, Repair Costs, and When to Call a Pro

One safety rule before you start

A submersible pump runs on 230 to 240 volts. DrillerDB's troubleshooting guide (updated July 2026) calls that voltage lethal and draws a hard line: a homeowner can reset a breaker once, read the gauge, check the tank air with the system drained, and look at the switch with the breaker off. Live voltage tests, motor tests, and pulling the pump are for a licensed pro. Nebraska Extension's NebGuide G2153 (2012) goes further and tells homeowners not to adjust the pressure switch at all. Turn the breaker off before you open anything.

Well pump troubleshooting, in order

1. The breaker. DrillerDB says a tripped double-pole breaker is the most common cause of a dead pump. Reset it once. If it trips again right away, stop: that points to a short, usually a failed start capacitor or a grounded motor.
2. The pressure gauge. Note the number on the gauge by the tank. Most switches are set to 30/50 or 40/60, which means the pump starts at the first number and stops at the second.
3. The pressure switch. With the breaker off, look for burned or pitted contacts, insects, or water around the switch. Our well pump pressure switch guide covers the signs of a failing switch and what replacement costs.
4. The pressure tank. A pump that clicks on and off every few seconds almost always has a waterlogged tank. Our short cycling guide shows how to check the air charge and fix it.
5. The control box. On a three-wire submersible pump, the start capacitor sits in a box on the wall. DrillerDB says a blown capacitor causes most start failures: the motor hums but will not spin. A capacitor or box swap does not need the pump pulled.
6. The pump and the well. If the power, switch, tank, and box check out, the fault is down the well: a worn pump, a broken drop pipe, a failed check valve, or a water level below the pump.

Why is there suddenly no water from my well?

Sudden loss of water feels like a dead pump, but cheaper causes come first. Work through the list above. Penn State Extension (updated June 2, 2025) says the most frequent cause of lost water is a worn-out or failing submersible pump, followed by electrical faults, a tank that needs replacing, clogging from iron bacteria or sediment, and a water level that drops below the pump during heavy use. If the water comes back after the well rests for a few hours, the well may be running low, and our guide to a well running dry covers what to do.

Why does my well pump run but there is no water pressure?

The pump has power but is not moving water to the tank. DrillerDB lists four causes: the water level has dropped below the pump intake, the drop pipe inside the casing has broken and sends water back down the well, the check valve has failed, or the pump is worn out. Water that spits air at the faucet points to a low water level or a failed check valve. Turn the breaker off. DrillerDB says a pump that runs without water can damage itself in under 30 minutes. All four causes need a well pro, and three of them mean pulling the pump.

If the pressure is fine at the gauge but weak at the taps, the pump is not the problem. That is a restriction in the plumbing, such as a clogged filter or slime in the lines, covered in our low water pressure guide.

Is there a well pump reset button?

Most submersible pumps have no reset button you can reach. The reset is the breaker in the panel. Some pressure switches carry a low-pressure cutoff, a small lever on the side of the switch that shuts the pump off when pressure falls too far. Square D's data bulletin for its 9013F and 9013G switches (December 2007) says to hold that lever in the Run position until the pressure is within 10 psi of the cut-in. If the switch cuts the pump out again when you let go, the well is low, and the bulletin says not to use the lever again until the well has water in it. Some constant-pressure controllers show a fault code instead; read it in the controller manual before you call.

How to test a well pump without pulling it

You can learn a lot from the surface without touching live wires. With the breaker off and the system drained, check the tank air charge. Then turn the power on, open a faucet until the pump starts, close it, and watch the gauge. A healthy pump brings the pressure from cut-in to cut-out and shuts off. A pump that runs and runs without reaching cut-out is either worn, short of water, or losing water to a leak. Turn off every tap and watch the gauge for an hour: if the pressure falls, there is a leak or a bad check valve.

A well pro tests the motor from the surface too, with a meter on the running current and an insulation test on the pump wires. DrillerDB lists both as pro-only work. Those readings tell the pro whether the motor, the wire, or the control box has failed before anyone pulls hundreds of feet of pipe.

What does well pump repair cost?

These are 2026 national ranges from The Well Guide (updated October 2026) and DrillerDB, both commercial cost guides. PlumberCalc puts a pump replacement at $1,000 to $2,800 in 2026, so the guides differ by hundreds of dollars on the same job. Depth moves the price more than anything: The Well Guide says each extra 100 feet adds roughly $500 to $1,000 in pipe, wire, and labor, and emergency weekend service adds 25 to 50 percent.

Repair or replace the pump?

The Well Guide gives a simple rule: if a repair means pulling the pump and costs more than half of a full replacement, replace the pump. It also says to replace a pump that is over 12 years old with a motor or impeller problem, or one that has ever run dry. If the pressure tank is more than about 8 years old, ask for a quote on both, because adding the tank while the crew is there costs far less than a second visit. Ask whether the quote includes new drop pipe and wire, and get it in writing with the parts listed.

After the pump is fixed

Pulling a pump opens the well, so treat the well before you drink from it again. Our guide on how to treat a well explains the steps, and a bacteria test 7 to 14 days later shows whether it worked. If the well can no longer keep up and the pro suggests a new one, our water well drilling cost guide has a calculator. Our well lookup finds your well's depth and water level, the first numbers a pump pro asks for.