Quick answer: When a well stops delivering water, the cause is usually one of three things: no power to the pump (tripped breaker, failed switch or control box), a pressure-system problem (pressure switch, waterlogged tank, closed valve) or a pump or well problem (failed pump, lost prime, low water level, broken pipe). Start with the simple checks below: the breaker, the pressure gauge and the pressure switch. They take 10 minutes and solve a large share of “no water” calls. Always turn off power before touching any electrical part, and do not keep running a pump that may be dry.
In this guide
- Safety first
- Two-minute triage: what exactly is happening?
- The 10 checks, in order
- Quick diagnosis table
- What it costs to fix
- When to call a professional
- Getting through a water outage
- What to do after water returns
- How to prevent it from happening again
- FAQ
1. Safety First
A well system combines 230-volt electricity, pressurized water and heavy equipment. Before you start:
- Turn off the pump’s circuit breaker before opening a pressure switch, control box or wiring. A pressure switch can carry 240 volts even when no water is flowing.
- Never work on electrical parts with wet hands or while standing in water. If the pump house or basement is flooded, do not enter until the power is off at the main panel and a professional says it is safe.
- Do not keep running a pump that may be dry. Without water, a submersible pump overheats and can burn out within minutes.
- Do not try to pull a submersible pump yourself. It is heavy, and the wiring is dangerous.
- Reset a tripped breaker only once. If it trips again, stop and call an electrician or well contractor.
If you are not comfortable with any step, skip it and call a licensed professional.
2. Two-Minute Triage: What Exactly Is Happening?
Answering these questions will point you toward the right check.
| Question | What the answer suggests |
|---|---|
| Is there no water at any fixture, or only at one? | One fixture: local problem (faucet, aerator, fixture valve). All fixtures: system problem. |
| Is it only the hot water that’s missing? | Water heater problem, not the well |
| Did the power go out recently, or did a storm or lightning hit? | Tripped breaker, damaged control box or damaged pump |
| Can you hear the pump running (or humming)? | Running or humming but no water: pump, prime or water level problem. Silent: electrical or switch problem. |
| What does the pressure gauge show? | 0 PSI: pump is not delivering. Normal PSI but no flow: closed valve, clogged filter or downstream blockage. |
| Did water trickle, sputter and air come out first? | Air in lines, low well level or a failing pump |
| Is it freezing outside? | Frozen pipe, frozen pump house or frozen tank |
| Was any work done on the plumbing or well recently? | A closed valve, air lock or disturbed sediment |
| Is your neighbor’s well also out? | A regional power or drought problem |
3. The 10 Checks, in Order
Check 1: Is the pump getting power?
This is the most common cause of a sudden “no water” situation.
- Look at your electrical panel. Find the breaker labeled “well,” “pump” or “water.” A tripped breaker sits in the middle or “off” position. Switch it fully off, then back on.
- Check for a GFCI outlet if your pump or pressure switch is on a GFCI-protected circuit. Press the reset button.
- Check for a pump disconnect switch (a small box near the pressure tank or well) and make sure it is on.
- Listen. After you restore power, the pump should start if the pressure is below the cut-in setting.
If the breaker trips again right away, do not keep resetting it. This points to a shorted motor, damaged wiring or a failing control box. Call a professional.
Check 2: What does the pressure gauge say?
The gauge is on or near the pressure tank. Most systems operate between 30 and 50 PSI, 40 and 60 PSI, or a similar range.
- 0 PSI (or very low) and the pump is silent: The pump is not running. Go to Checks 1, 3 and 7.
- 0 PSI and the pump is running constantly: The pump is running but not building pressure. Go to Checks 5, 6 and 9.
- Normal pressure, but no water at faucets: Water is stopped downstream. Go to Checks 9 and 10.
Check 3: Is the pressure switch working?
The pressure switch turns the pump on when pressure falls to the cut-in point. If it fails, the pump never starts, even though the pump itself is fine.
What to check (with the power OFF):
- Remove the cover and look at the contacts. Burnt, black or pitted contacts mean the switch has failed.
- Look for insects, nests or debris inside the cover. Ants and wasps often cause contact failures.
- Check that the small tube or port under the switch (which senses water pressure) is not clogged with sediment or mineral scale.
- Some switches have a low-pressure cutoff lever (as in some pump-saver designs) that trips when pressure falls too low. If yours has one, it may need to be reset after the water level or pressure problem is fixed.
A pressure switch is a low-cost part, but a wrong adjustment can damage the system. See our guide on how to adjust a well pressure switch safely, or have a professional replace it.
Check 4: Is the pressure tank waterlogged or damaged?
The tank stores pressurized water and gives the pump rest between cycles. When the air side fails, the tank can no longer hold pressure.
Signs of a failed tank: pressure that drops to zero quickly, the pump starting every few seconds (short cycling), or spitting air and water from faucets.
Quick test: Turn off power and open a faucet to drain the tank. Check the air valve on the tank (it looks like a tire valve). If water comes out when you press the valve core, the internal bladder or diaphragm has ruptured, and the tank needs replacement. If air comes out, check the precharge pressure with a tire gauge. It should be 2 PSI below the pump’s cut-in setting (for a 30/50 switch, 28 PSI).
Check 5: Is the pump running, humming or silent?
| What you hear | Likely issue |
|---|---|
| Pump runs continuously, little or no water | Lost prime (jet pump), low water level, broken drop pipe, worn pump or a leak |
| Humming or buzzing, but no running | Failed capacitor or start relay (control box), seized motor, or low voltage |
| Click, then silence | Power is reaching the switch, but the pump is not starting: control box, motor or wiring |
| Silence | No power, failed pressure switch, tripped overload or failed motor |
| Grinding or rattling | Worn bearings, sand wearing the pump or a failing motor |
For a jet pump: If it has lost its prime (air has replaced water in the pump), it can often be re-primed by filling the pump housing through the prime port following the manufacturer’s instructions. Frequent loss of prime points to an air leak in the suction line or a failing check or foot valve.
For a submersible pump: If it is running with no flow, shut it off. The pump could be out of water, broken apart or disconnected from the pipe. It needs a professional.
Check 6: Has the well run low or dry?
A well can produce less water when:
- A drought lowers the water table.
- A heavy water-use day (laundry, irrigation, a full house) draws the well down faster than it recovers.
- The well has low yield by nature, and demand exceeds supply.
- Neighboring wells, new irrigation or construction have changed local groundwater.
Clues: Water comes back after you turn the pump off for several hours (or overnight). Faucets sputter with air. Sand or sediment appears. Water is out mostly in late summer.
What to do:
- Turn the pump off to avoid burning it out.
- Rest the well for several hours (preferably overnight), then try again.
- Reduce usage (no irrigation, fewer loads of laundry, shorter showers).
- Ask a well contractor to measure the water level and the flow rate, and to check whether the pump is set at the right depth. Options include lowering the pump, deepening the well, hydrofracturing it or adding a storage tank. See our guide on a well running dry in a drought.
Check 7: Is the control box or capacitor failing? (3-wire submersible pumps)
If your pump has a control box (a small gray or metal box near the tank), it holds the start capacitor and relay. A failed capacitor is a common reason a motor hums without starting.
This is a professional job. Capacitors store a charge even after power is off, and misdiagnosis can lead to buying a pump you do not need. A technician can test the motor windings and capacitor in a few minutes.
Check 8: Is something frozen?
In cold snaps, water lines, the pressure tank, the pressure switch tube or the pump house can freeze.
- Look for frost on exposed pipes and check that the pump house heater or heat tape is working.
- Thaw slowly using a hair dryer, warm towels or a heat lamp. Never use an open flame or a propane torch.
- Open a faucet before thawing so melting water has somewhere to go.
- If a pipe has split, you will see water once it thaws. Shut off the pump and call a plumber.
See our guide on thawing and preventing frozen well pipes.
Check 9: Is there a leak or closed valve?
Water that leaves the system before reaching your faucets can look like a well failure.
- Check the main shutoff valve and any isolation valves near the tank and filters. Valves are sometimes closed after plumbing work and never reopened.
- Leak test: Turn off every fixture and appliance. If the pump keeps running, or the gauge drops steadily, you probably have a leak.
- Look for wet spots along the line from the well to the house, in the basement, near the pressure tank and around the wellhead. A sinkhole or a patch of unusually green grass in the yard can mean a buried line has broken.
- Check toilets: A running toilet can use a surprising amount of water.
A broken line between the well and the house will usually make the pump run non-stop while delivering little water to the house.
Check 10: Are filters, softeners or fixtures blocking the flow?
If the pump and pressure look fine, water may not be passing through downstream equipment.
- Clogged sediment or whole-house filter. Bypass the filter, or replace the cartridge, and see if flow returns.
- Water softener or iron filter stuck mid-cycle or clogged. Put it in bypass mode.
- Clogged faucet aerators or shower heads (a localized problem).
- Sediment carried by a recent pump disturbance, flooding or a well collapse.
If bypassing the equipment restores water, you have found the culprit. Service or replace the filter or softener.
4. Quick Diagnosis Table
| Symptom | Most likely cause | First thing to do |
|---|---|---|
| No water, pump silent, gauge at 0 | Tripped breaker, failed pressure switch, control box or motor | Check breaker, then switch (power off) |
| No water, pump running nonstop | Low water level, lost prime, failed pump, broken pipe | Turn off the pump; call a pro if the level is unknown |
| Pump hums but won’t start | Failed capacitor or seized motor | Turn off the breaker; call a pro |
| Sputtering air, then no water | Low well level or air leak | Rest the well; reduce usage |
| Pressure drops fast, pump cycles often | Waterlogged tank | Check the air valve and precharge |
| Water out only in cold weather | Frozen line or equipment | Thaw slowly; check heat source |
| Pressure normal, no water at faucets | Closed valve or clogged filter | Check valves; bypass filters |
| Pump runs constantly, pressure never builds | Leak, damaged drop pipe or worn pump | Do a leak test; call a pro |
| No water after a storm or flood | Power damage, flooded wellhead, contamination | Keep power off; call a pro; test water later |
5. What It Costs to Fix
Prices vary by region and well depth. These are typical U.S. ranges and should be confirmed with local contractors.
| Repair | Typical cost (parts and labor) |
|---|---|
| Service call or diagnosis | $100 – $250 |
| Pressure switch replacement | $120 – $350 |
| Capacitor or control box | $150 – $500 |
| Pressure tank replacement | $500 – $1,500 |
| Jet pump replacement | $500 – $1,500 |
| Submersible pump replacement | $1,200 – $3,500+ (deeper wells cost more) |
| Repair of a broken water line | $500 – $3,000+ depending on length and digging |
| Well deepening or hydrofracturing | $3,000 – $15,000+ |
| Emergency or after-hours surcharge | Often $100 – $300 extra |
See our full guides to well pump replacement cost and pressure tank replacement cost.
6. When to Call a Professional
Call a licensed well contractor or electrician if:
- The breaker trips again after one reset.
- You smell burning, see smoke or hear loud grinding from the pump.
- The pump hums but will not start.
- The pump runs constantly and you cannot find a leak.
- You suspect the well is dry or the pump has failed.
- You need to open or work on any electrical component and are not trained.
- The water or wellhead has been flooded.
- The problem keeps returning after your fixes.
What to tell the technician: the pump’s age and type, what you checked, what you heard, the gauge reading, any recent storms or work, and the well depth if you know it. This speeds up the visit and may lower the bill.
7. Getting Through a Water Outage
- Drinking water: Plan on at least 1 gallon per person per day for drinking and basic hygiene, plus more for pets and cooking.
- Stored water: Use bottled water, a water-storage container or water from a neighbor.
- Flushing: Pour a bucket of non-drinking water into the toilet bowl to flush.
- Water heater: The tank holds many gallons of water that can be drained and used if needed. Turn off power and gas to the heater first.
- Generators: If the problem is a power outage, a properly sized generator can run the pump. See our guide on what size generator you need to run a well pump.
- Safety: Do not use water of unknown quality for drinking, especially after flooding. Boil it for 1 minute (3 minutes above 6,500 feet) or use bottled water.
8. What to Do After Water Returns
- Run the water for several minutes to flush air, sediment and discolored water from the lines. Start with outdoor spigots.
- Check the pressure gauge and watch the pump cycle for a few minutes.
- Look for leaks at the tank, pipes and switch.
- Replace filters if they are clogged with sediment.
- Test your water if any of these apply: the well was flooded, the pump or well was opened or repaired, you noticed sand or discoloration, or the water smells or tastes different. See our guide: How to Test Well Water.
- Disinfect the well (shock chlorination) if the pump was pulled, the well was opened or bacteria tests came back positive.
9. How to Prevent It From Happening Again
- Test the system once a year: check the gauge, the tank precharge and the pressure switch.
- Know your system: write down the pump type, horsepower, depth, installation date and the pressure switch settings.
- Keep a log of gauge readings and pump run times, so you can notice changes.
- Replace aging parts proactively. Pressure switches and capacitors are low-cost items compared with a failed pump.
- Protect against cold: insulate the pump house, use heat tape and keep a source of heat.
- Conserve during droughts: spread out heavy water use.
- Install protection: a surge protector at the panel, a low-water cutoff or a pump-saver device and, if you live where outages are common, a generator transfer switch.
- Keep a basic emergency water supply stored at home.
- Schedule a professional inspection every few years.
10. FAQ
Why did my well suddenly stop giving water?
The most common reasons are a tripped breaker, a failed pressure switch, a failed capacitor or control box, a worn-out pump, or a low water level. Start with power, gauge and switch before assuming the well has run dry.
How do I know if my well pump is bad?
Signs include a pump that runs but delivers little or no water, humming without starting, a breaker that trips repeatedly, sputtering air, loud noises and rapid cycling. A professional can test the motor and measure amps to confirm.
Can a well run out of water?
Yes. Drought, heavy use, a low-yielding well or changes in nearby groundwater can lower the water level below the pump intake. The water often returns after the well has rested for several hours.
Why do I have no water but the pump is running?
The pump may have lost prime (jet pump), the well level may be too low, a pipe may be broken or leaking, or the pump may be worn or disconnected. Turn the pump off and have it checked.
Can a bad pressure switch cause no water?
Yes. If the switch fails to close its contacts, the pump never starts even if the pump is perfectly fine. A burnt or stuck switch is a common and inexpensive repair.
Will a power outage cause well pump damage?
The outage itself usually does not. The power surge when electricity returns can, which is why a surge protector at the panel is a good investment.
How long can a well go without water?
That depends on the cause. A low well often recovers in several hours to a day. Mechanical or electrical failures need repair and can take from the same day to a few days, depending on parts and the contractor’s schedule.
Do I need to test my water after a no-water episode?
If the well was flooded, opened, repaired or if the water looks, smells or tastes different afterwards, yes. Test for bacteria at minimum.
Related Guides
- Low Water Pressure From a Well: 9 Causes and Fixes
- Well Pump Won’t Turn On: 8 Causes and Fixes
- Well Running Dry in a Drought: Emergency Steps
- How to Adjust a Well Pressure Switch Safely
- Well Pump Short Cycling: Causes and Solutions
- Why Does My Well Pump Breaker Keep Tripping?
- How to Thaw a Frozen Well Pipe and Prevent It Next Winter
- Well Pump Replacement Cost in 2026 (By Pump Type and Depth)
Sources
- U.S. Environmental Protection Agency: Private Drinking Water Wells
- Centers for Disease Control and Prevention: Private Well Water, Emergencies and Water Treatment
- National Ground Water Association: Well owner resources
- University extension publications on well and pump troubleshooting
- Manufacturer manuals for pressure switches and pressure tanks
Disclaimer: This article is for general information and does not replace a professional diagnosis. Well and electrical systems vary and can be dangerous. Always turn off power before inspecting any electrical component, and hire a licensed professional for electrical work and pump service.