Problems
Well Pump Running Constantly
Do not simply leave it running
The two broad explanations
Pressure genuinely is not reaching cut-out. Water is leaving the system as fast as the pump supplies it, the pump can no longer produce the required pressure, or the well cannot deliver enough water for it to build.
Pressure is reaching cut-out but the pump does not stop. That is a control-side problem — the switch or the wiring is not responding. More on control faults.
Possible causes
| Cause | Pattern that often accompanies it |
|---|---|
| Leak in the plumbing or supply line | Pump runs when no one is using water; possibly damp ground or unexplained water use |
| Running toilet or stuck fixture | Constant low-level demand somewhere in the house |
| Pressure switch not opening at cut-out | Gauge reaches normal pressure but the pump continues |
| Switch set beyond what the system can reach | Pressure plateaus below the cut-out setting |
| Pump wear or performance loss | Gradual decline in pressure over months |
| Well yield or low water level | Runs after heavy use; recovers after a rest period |
| Drop pipe or check valve issue | Water fails to hold in the delivery path |
| Demand genuinely exceeding capacity | Only during irrigation or several fixtures at once |
Safe checks
- Turn off every fixture and confirm the pump still runs with no demand
- Check toilets for silent running and outdoor taps for drips
- Look for unexplained damp ground along the line between well and house
- Read the pressure gauge, if safely visible, and note where the pressure plateaus
- Note whether this began suddenly or built up over time
- Note whether it coincides with heavy use, irrigation, or dry weather
That is the extent of safe homeowner checking. The rest is measurement.
The well-yield case
If the pump runs continuously during and after heavy use and behaves normally again the next morning, the well's ability to supply water may be the constraint. This is the case where replacing equipment is most likely to disappoint.
Raise it explicitly before any pump is quoted. Dry well or pump failure?
What professional diagnosis covers
- Pressure readings against actual switch settings while the system runs
- Whether the switch opens correctly when cut-out pressure is reached
- A pressure-hold test to identify leaks
- Pump performance and electrical testing
- Water level and recovery behaviour in the well
- Tank condition, since it interacts with everything above
Get a constantly running pump evaluated
Share what your system is doing and request quotes from independent well and pump service providers working in your area.
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