Well Pump Producing No Water: Diagnostic Checklist

A well pump that produces no water is one of the most disruptive failure modes in private water supply systems, affecting an estimated 15 million households that rely on private wells across the United States (U.S. Environmental Protection Agency, Private Drinking Water Wells). This reference covers the structured diagnostic framework used by licensed well pump service professionals to identify the failure point, classify the problem by type, and determine which corrective pathway applies. The checklist spans electrical, mechanical, and hydraulic fault categories, reflecting the multi-system nature of well pump failures.

Definition and scope

A "no water" condition in a well pump system is defined as zero or near-zero flow at the pressure tank outlet or at fixtures downstream of the pressure switch, regardless of whether the pump motor is running. This distinguishes a no-water failure from a low-pressure or intermittent-flow failure, which involve different diagnostic trees.

The scope of this checklist covers submersible well pumps (the dominant installation type in residential applications, typically set between 100 and 400 feet below grade) and above-ground jet pump configurations. Submersible pumps operate entirely below the water table and push water upward; jet pumps sit at the surface and pull water using suction, with shallow-well jet pumps rated for lifts up to 25 feet and deep-well jet pumps capable of reaching depths around 80 to 100 feet under standard conditions (Hydraulic Institute Standards for Pumps).

The Well Pump Repair Listings reference covers licensed service providers by region for both pump types. Licensing requirements for well contractors vary by state; the majority of states require a separate well driller or pump installer license distinct from a general plumbing license, administered through state environmental or natural resources agencies.

How it works

A functioning well pump system operates through four integrated components: the pump motor (or pump-and-motor assembly in submersibles), the drop pipe and wiring that descend into the well, the pressure tank, and the pressure switch. Failure at any single node interrupts water delivery.

The diagnostic sequence follows electrical pathways first, then mechanical, then hydraulic:

Electrical supply verification — Confirm that the circuit breaker or fuse feeding the pump panel is not tripped or blown. A 240-volt submersible pump circuit typically draws 5 to 15 amps under normal operation; a dead short or seized motor can trip the breaker instantly.
Pressure switch inspection — The pressure switch (set points commonly at 30/50 psi or 40/60 psi) may have corroded contacts or a blocked sensing port. A switch that does not close fails to energize the pump.
Control box evaluation (submersible only) — Two-wire submersible systems integrate start capacitors internally; three-wire systems use an external control box containing start and run capacitors and a relay. A failed capacitor produces a running motor with no torque and no water movement.
Pressure tank bladder check — A waterlogged pressure tank (failed bladder) causes rapid pressure cycling and can mask low-flow conditions. Pre-charge pressure on a bladder tank should match pump cut-in pressure minus 2 psi (Well Owner's Handbook, National Ground Water Association).
Drop pipe and check valve inspection — A failed foot valve or check valve allows water to drain back into the aquifer between pump cycles, producing a "runs but delivers nothing" symptom until the column re-primes.
Pump motor and impeller assessment — Worn or sand-locked impellers, a burned motor winding, or a failed pump shaft coupling halt water production even when electrical signals are nominal.

Common scenarios

The four most frequent diagnostic findings in a no-water service call are:

Tripped breaker with no resets possible — Indicates a hard electrical fault: motor winding failure, grounded drop wire, or seized pump. Resetting the breaker without diagnosis risks further damage or safety hazard. OSHA 29 CFR 1910.303 governs electrical safety standards applicable to pump service work (OSHA Electrical Standards).

Pump runs, no water delivery — Points to a check valve failure, a broken drop pipe joint, or a pump that has lost prime (jet pump) or lost impeller integrity (submersible). This is the scenario where the motor is audibly or measurably drawing current but no flow reaches the pressure tank.

Well has gone dry — A declining water table or seasonal drought drops the static water level below the pump intake. This is verified by measuring the static water level with an electric water-level meter. The pump itself may be undamaged; relocation of the pump setting to a greater depth or waiting for aquifer recovery are the two remediation paths.

Pressure switch failure — Contacts welded shut (pump runs continuously) or contacts that fail to close (pump never starts) are both common after power surges. A pressure gauge installed at the tank tee provides the first diagnostic data point: zero pressure with a tank that is not depleted confirms no pump operation.

Decision boundaries

The decision to repair versus replace a well pump assembly depends on age, failure type, and depth. The Water Systems Council and National Ground Water Association both note that submersible pump assemblies have a service life averaging 8 to 15 years under normal conditions, with actual lifespan governed by water chemistry (iron, sediment, and pH), duty cycle, and motor quality (Water Systems Council, Well Care Program).

Repair is the appropriate pathway when:
- The failure is isolated to an above-ground component (pressure switch, control box, pressure tank)
- The pump motor tests within acceptable winding resistance ranges (typically 0.5 to 2.0 megohms insulation resistance for a serviceable motor)
- The pump is under 7 years old with documented installation

Replacement is indicated when:
- Winding resistance reads below 0.5 megohms or shows ground fault
- Impeller components are sand-locked or mechanically destroyed
- The pump is beyond 12 years of service in a high-sediment or high-iron water environment
- Multiple components within the submersible assembly have failed simultaneously

Pulling a submersible pump from a cased well constitutes well work in most state regulatory frameworks. In the majority of states, this activity requires a licensed well contractor permit, not merely a plumbing permit, filed with the state's environmental or water resources agency. Permit requirements exist independently of whether the pump is being repaired or replaced.

For locating licensed contractors qualified for submersible pull-and-replace work, the Well Pump Repair Listings directory is organized by state licensing category. The Well Pump Repair Directory Purpose and Scope page describes how contractor qualifications are classified within this reference.

References

✅ Citations verified Feb 25, 2026 · View update log