Shallow Well Pump Troubleshooting: No Water or Low Pressure
Quick answer: For a shallow well pump problem, first distinguish a silent pump, a running pump that produces no water, and a pump that cycles repeatedly. Record the visible pressure-gauge reading and any recent outage or plumbing work. Do not open the pressure switch or control box to begin troubleshooting.
Stop a pump that is running without water using its safe shutdown instructions. Keep clear of hot or pressurized parts and wet electrical equipment. Do not remove a priming plug from a hot pump or repeatedly restart it. Use a qualified well professional for electrical testing and internal repairs.
Match the symptom before choosing a repair
| Symptom | Possible areas to assess | Homeowner observation |
|---|---|---|
| Pump silent, no water | Power supply or controls | Known outage, visible breaker position, and controller message |
| Pump runs, no water | Prime, suction path, water level, or pump | When it began and whether the pump recently ran dry |
| Low pressure or low flow | Water availability, restrictions, leaks, or pump performance | Whether all taps are affected and when demand changes the symptom |
| Rapid starts and stops | Pressure tank, controls, or returning/leaking water | Gauge behavior and cycle timing from a safe distance |
| Problem returns after priming | Suction leak, check/foot valve, water level, or setup | How long it holds prime and any recent pipe work |
Why loss of prime needs a model-specific approach
A jet pump relies on the correct water-filled pump and suction arrangement. Refilling the pump repeatedly does not resolve a leak or a water-supply limitation. The correct priming procedure, plug locations, and system limits depend on the model.
Pentair’s shallow-well pump manual warns against dry running because water in the pump can become dangerously hot and pressurized. Use the instructions for your pump and ask for service if it will not hold prime.
Safe checks that do not expose wiring
- Check whether the whole house has lost water or only one fixture.
- Read any accessible gauge or display without removing a cover.
- Look for visible leaks in accessible pipework from a dry position.
- Record recent outages, freezing conditions, plumbing changes, or unusual water demand.
- If a breaker repeatedly trips, leave the system off and arrange electrical or well-pump service.
Do not bridge pressure-switch contacts, adjust switch springs by trial and error, or treat a capacitor as safe merely because time has passed after shutdown.
What to provide when calling
Have the pump model, well records if available, visible gauge reading, whether the motor runs, and the symptom timing ready. Ask the professional to distinguish a pump fault from a suction, water-level, piping, control, or pressure-tank problem before proposing replacement.
If replacement is recommended, use our well-pump cost and quote checklist. For broader symptom organization, see no water from a well and rapid pump cycling.
Should I replace the pressure switch first?
No. A silent pump can have several causes. Guessing at electrical parts can create hazards and may leave the original problem unresolved.
Can I keep priming until it starts working?
Repeated loss of prime needs its cause identified. Stop before the pump runs dry or becomes hot, and follow the model’s safe service procedure.
Updated September 12, 2026. Edited by Jabeer. General educational guidance.