Why is my well pump running but no water?
Updated August 2026
A well pump you can hear running while nothing comes out of the taps most often means the water level in the well has dropped below the pump's intake, so it is pumping air instead of water. That shows up in a drought, after unusually heavy use, or as a well slowly loses yield. The other leading causes are a worn pump that spins but no longer lifts, and a stuck check valve or lost prime on a jet pump. Repairs range from nothing (letting the well recover) to a full pump replacement, so working out which of these you have is the whole game.
Safety first: a submersible well pump runs on a 240-volt circuit and hangs on a drop pipe that can be a hundred feet or more down the casing, well beyond safe DIY territory. Kill the breaker before opening any control box, and never let a pump run dry for long, since pumping air overheats the motor and can destroy it within hours. On a jet pump, do not keep force-priming a pump that will not catch, and if the water comes back muddy or foul after a level drop, have it tested before you drink it.
Causes, most likely first
| Cause | How likely | The fix | Typical cost |
|---|---|---|---|
| Water level below the pump intake | Most common | Shut the pump off for a few hours to let the well recover; lower or deepen the pump if it repeats. | $0 to rest, more to deepen |
| Worn pump or impellers (spins, no lift) | Common | A contractor pulls and replaces the pump after confirming with amp and drawdown tests. | $800–2,500 submersible |
| Stuck check valve or lost prime (jet pump) | Common | Re-prime the jet pump; free, or replace a failed check or foot valve. | $150–400 |
| Broken drop pipe or pulled fitting | Occasional | Pull the system and repair the pipe that carries water up the well. | $500–1,500 |
| Air lock in the line | Occasional | Bleed the trapped air; it often clears once the water level recovers. | $0–150 |
| Cracked suction line on a jet pump | Rare | Replace the suction pipe that is drawing air instead of water. | $150–500 |
Check these first
- Confirm the pump is truly running: listen at the pressure tank or pump for the motor, and check that the breaker has not quietly tripped.
- Think back over the last day or two for heavy use, such as filling a pool or long irrigation, or a regional drought that could have drawn the well down.
- Open a faucet and listen; sputtering and spitting air is the classic sign the pump is sucking air above a dropped water level.
- On a jet pump, pull the prime plug and check the water level in the pump housing, because a jet pump that has lost prime pumps nothing.
- Read the pressure gauge; zero or barely rising pressure while the motor runs confirms the pump is moving no water.
Prevent it next time
You cannot make it rain, but you can avoid being blindsided. Spread out heavy draws like irrigation and pool filling so you never pull the well down faster than it recovers, and test the well pump and its recovery rate yearly to catch a declining yield before it strands you. Pumps wear out: knowing the 8 to 15 year well pump lifespan lets you budget a planned replacement instead of an emergency one, and the well pump maintenance checklist keeps the check valve, wiring, and pressure controls on a routine.
When to call a pro
Resting a drawn-down well and re-priming a jet pump are jobs you can try yourself. Everything below the wellhead is not: pulling a submersible, replacing a drop pipe, or diagnosing a dead pump means a licensed well contractor with a hoist. A submersible pump replacement typically runs $800–2,500, a drop pipe or fitting repair $500 to 1,500, and a service call to measure drawdown and pump amps a few hundred dollars. Call right away if the motor runs nonstop with no water, since a pump running dry overheats and can fail within hours.
Most of the causes above are maintenance problems wearing a disguise. OnOtto keeps the boring prevention on schedule so the 2 a.m. version doesn't happen.
Stop chasing symptoms, free for 30 daysFrequently asked questions
Can a well run dry and then come back?
Often, yes. Many wells recover on their own once you stop drawing them down, especially when the cause was a short spike in use rather than a long drought. Shut the pump off for a few hours so groundwater can seep back in and refill the casing above the intake, then run a single tap and watch for steady flow. If it recovers but keeps happening during dry spells, the fix is usually to lower the pump deeper or deepen the well itself. A well that never comes back needs a contractor's drawdown test.
How much does it cost to replace a well pump?
A submersible well pump replacement generally runs $800 to 2,500 installed, driven mostly by the pump's horsepower and how deep it sits, since the crew has to pull and reset the entire drop pipe. A shallow-well jet pump is cheaper, often $400 to 900. Add more if the drop pipe, wiring, or pitless adapter also need work. Before paying for a new pump, have the contractor confirm the pump is actually the problem with amp and drawdown tests, because a dropped water table can mimic a failed pump.
Why does my jet pump keep losing prime?
A jet pump lifts water by suction, so it depends on a sealed, water-filled line all the way to the well. It loses prime when a foot valve or check valve leaks back, when there is an air leak in the suction piping, or when the water level falls below the pump's reach. Refill the pump housing through the prime plug and restart; if it will not hold, the foot or check valve is the usual suspect, a $150 to 400 repair. A cracked suction line drawing air is the other common cause.