A stuck pressure switch, failed check valve, leaks, or low well yield can keep a well water pump running; verify pressure, flow, and leaks step by step.
If your well system runs nonstop, you’re paying for wasted power and risking motor wear. This guide walks you through fast checks, deeper diagnostics, and safe fixes that restore normal on–off cycling. You’ll learn what the pressure gauge is telling you, how to test a check valve without digging, and when to call a licensed well contractor.
Why A Well Pump Runs Constantly: Quick Checks
Start with these simple observations before grabbing tools. Each item below can confirm or rule out a common cause in minutes.
Common Causes, Telltale Signs, And Fast Tests
| Symptom | Likely Cause | Quick Test |
|---|---|---|
| Gauge climbs near cut-out but never reaches it | Clogged filter, restricted line, undersized jet, or switch set above system capability | Bypass/replace clogged filter; open a nearby hose bib to feel flow; compare switch setting to pump’s realistic pressure range |
| Gauge reaches cut-out, then drops fast with no water use | Leaking plumbing, failed check valve/foot valve, pin-hole tank line | Shut house valve; if pressure still falls, suspect check valve or drop-pipe leak; listen for water movement at well cap |
| Gauge sits low and steady, pump hums nonstop | Dry/low-yield well or clogged intake screen | Open tap: if flow is weak and air spits, pause pump to let the well recover and recheck pressure |
| Contacts in pressure switch stay closed even with high pressure | Welded or stuck switch, burned contacts, debris under diaphragm | Power off; remove cover; inspect contacts; gently tap—if contacts free and pump stops later, replace the switch |
| Short spurts on and off, then long run | Waterlogged or undersized pressure tank, lost pre-charge | Power off, drain tank, read air valve; set pre-charge 2 psi below cut-in; confirm tank size fits household draw |
| System with variable-speed drive never reaches sleep | VFD sleep threshold or sensor fault; small hidden leak keeps demand alive | Check drive status/logs and pressure sensor; isolate zones to find trickle leaks |
| Hot motor housing, buzzing, weak flow | Pump working far left on its curve from blockage or wrong setup | Check valves/filters for blockage; confirm open valves; compare target pressure to pump capability |
Read The Gauge Like A Pro
Your pressure gauge is the fastest window into pump behavior. Watch it for one full cycle with all taps closed.
Steady Rise That Stalls Below Cut-Out
This pattern points to restriction or goals set too high. If a cartridge filter sits before the tank, remove or bypass it and retry. If the switch is set to a lofty 60–80 psi while the pump was designed for 30–50 or 40–60 psi service, the system may never hit the target. Manufacturer data sheets for common switches list typical ranges like 30–50 and 40–60 psi, with adjustments for cut-in and cut-out on separate nuts (range and differential). Link the switch goal to what the pump can reasonably deliver, not the other way around. Pressure switch adjustment steps show the correct sequence for tuning cut-in and differential.
Climb To Cut-Out, Then Sudden Drop
If the gauge hits the top setpoint and falls fast with no fixtures open, water is slipping back downstream. That often means a leaky check valve, foot valve, or a crack in drop pipe. Close the house valve to isolate the home; if pressure still falls, the issue is on the well side. Check valves exist to stop backflow after shutoff and prevent backspin and water hammer. Well check valve basics explain location and function.
Low And Flat
A low, flat gauge while the motor runs hints the well is under-producing or the intake is clogged. Give the aquifer a rest—pause power, wait fifteen minutes, then retry. If pressure recovers slowly and drops again, the well may be starved. USGS notes that pumping forms a cone of depression; when supply can’t match demand, level falls and output slumps.
Set The Pressure Switch And Tank The Right Way
Most homes run happily at 30–50 or 40–60 psi. The switch’s large nut moves both cut-in and cut-out up or down together; the small nut widens or tightens the spread. Set tank air to 2 psi below the cut-in with power off and system drained. Schneider Electric’s support notes the adjustment sequence clearly for the 9013FSG series, and product pages list the 30–50 psi model directly.
Right-Sizing The Pressure Tank
A tiny tank forces frequent starts, shortens motor life, and can mask leaks that keep the motor engaged. Bigger drawdown gives the pump time to rest. If space allows, step up to a larger tank to reduce cycling during peak use. When in doubt, a licensed contractor can size the tank by household fixtures and pump capacity. The National Ground Water Association recommends regular inspection of private systems, which includes tank condition and controls.
Rule Out Hidden Leaks And Backflow
Even a slow drip can keep a call for pressure alive. Shut the house main. If the gauge still falls and the pump restarts, the loss is before the valve (well side). If pressure holds, reopen zones one at a time—irrigation valves, refrigerator line, outside bibs—watching the gauge after each step. A stuck toilet fill valve is a classic stealth draw.
Check Valve And Foot Valve Clues
Listen for water movement at the well cap with all taps closed. A soft hiss or trickle points to backflow. If you suspect a failed valve but want to avoid pulling pipe, install a temporary test gauge and shutoff after the tank; pressurize, then close the new valve. A drop with the house isolated confirms a well-side leak.
Filter, Screen, And Jet Issues
Clogged cartridge filters, iron buildup in screens, or a partially blocked jet will choke flow. Remove the filter element and retest. If pressure snaps to cut-out and the pump finally stops, you found the pinch point. Keep sediment filters sized for your flow rate and change them before they crust over.
Variable-Speed Drives: Special Notes
Drives add soft start, pressure stability, and motor protection, but they rely on sensor signals and sleep logic. If the panel shows constant run with no fixtures open, check the pressure transducer wiring and look at the “sleep” or “no flow” threshold in the setup. Franklin Electric field guidance lists common VFD flags like underload (dry well) and sleep issues; reviewing logs narrows the cause fast.
Safety First Around Power And Water
Always kill the breaker and verify with a non-contact tester before opening a pressure switch or touching wiring. Keep hands clear of moving parts on jet units. If contacts look burned or the diaphragm is cracked, replace the switch—don’t file pitted contacts and put it back in service. Manufacturer bulletins for the 9013 series outline basic troubleshooting and connection checks.
Step-By-Step Diagnostic Flow
1) Confirm The Complaint
Note the gauge reading, motor sound, and whether water use is actually off. Take a photo of the gauge for reference.
2) Isolate The House
Close the main valve to the home and watch the gauge for five minutes. A drop with the house isolated points to well-side backflow or a supply leak.
3) Bypass Restrictions
Remove or bypass cartridge filters and recheck. If pressure now reaches the top setpoint and shuts off, replace or upsize filtration.
4) Verify Switch Settings
Cut power, remove the cover, and read the factory tag. Many switches ship as 30–50 psi. If you want 40–60, raise cut-in and differential in the proper order, then match tank air to the new cut-in. Adjustment sequence.
5) Check For Low Yield
Run water steadily and watch for air sputter or falling pressure. Pause the pump and let the well recover. USGS materials explain how drawdown can reduce output during heavy pumping.
Care And Prevention
A little routine care keeps cycling normal and avoids nonstop run time:
- Annual check by a licensed well contractor: pump, wiring, switch, tank, and valves.
- Keep a labeled log: switch setpoints, tank pre-charge, filter change dates, and any repairs.
- Replace clogged filters early; don’t let them become the bottleneck.
- Protect the wellhead area and keep the cap sealed; EPA’s well owner pages outline basic protection steps. Private wells overview.
When The Pump Still Refuses To Stop
After you’ve cleared restrictions, tuned the switch, set tank air, and ruled out leaks, it’s time to look deeper:
Undersized Pump Vs. High Targets
If the pump was selected for modest pressure and the switch is dialed up, it may never reach the top setpoint. Lower the target to match the pump or upgrade the pump and drop pipe to fit the desired pressure and flow. Running far left on the pump curve stresses the motor and shortens life.
VFD Sleep Not Engaging
Small continuous draws—ice maker, RO flush, weeping valve—can keep a drive awake. Raise the sleep threshold slightly or add a small buffer tank to let the drive rest between sips. Franklin Electric notes sleep and sensor issues as common field findings.
Switch Or Sensor Faults
Electromechanical switches can stick; electronic sensors can drift. If contacts weld closed or a transducer outputs a false low, the motor never gets the stop signal. Replace the faulty part rather than chasing intermittent behavior.
Pressure Targets, Tank Air, And What Each Setting Does
| Setup | Typical Values | Notes |
|---|---|---|
| Standard switch ranges | 30–50 psi, 40–60 psi | Set tank air to 2 psi below cut-in; adjust range first, then differential. |
| Tank pre-charge | 28 psi for 30–50; 38 psi for 40–60 | Measure with system drained and power off; use a reliable tire gauge. |
| Confirm capability | Match switch range to pump output | If the pump can’t reach set cut-out, it will run nonstop; lower the goal or change equipment. |
Realistic Fixes You Can Do Today
Swap A Clogged Filter
Shut off power, close the supply, relieve pressure, and swap the cartridge. Keep spares on hand and date the housing with a marker.
Retune The Switch And Tank
Pick 30–50 or 40–60 to start. Adjust the large nut for cut-in/cut-out together, then the small nut for spread. Drain the tank and set air to cut-in minus 2 psi.
Leak Hunt In Zones
Close the house main to test the well side, then open zones one at a time. Replace worn flappers and outdoor vacuum breakers that weep.
Plan A Pro Checkup
Schedule an annual inspection by a licensed contractor. NGWA encourages routine inspections for private systems, and that visit can confirm sizing, wiring integrity, and valve health.
Well Health Matters Too
Pump problems sometimes reflect well conditions. Heavy draw can outpace recharge, pulling the water level down until flow fades. USGS resources explain how pumping creates a cone of depression and why output drops during hard use. If you suspect low yield, stagger high-demand uses and ask a pro about a recovery test.
Helpful Owner Resources
- EPA well owner guidance covers siting, protection, and testing basics.
- NGWA water pressure notes touch on constant pressure options and inspection tips.
Bottom Line Actions That Stop Endless Run Time
- Bypass filters and recheck cut-out reach.
- Set a realistic range like 30–50 or 40–60 and match tank air.
- Isolate the house; if pressure falls, plan for check-valve or drop-pipe service.
- If a drive is installed, review sleep and sensor settings and scan for tiny leaks.
- Book an annual inspection to catch wear before it becomes a dead-of-night outage.