What causes a well pump to run but no water comes out?

A well pump running but no water usually points to a loss of prime, a bad pressure switch, a failed pump component, a blocked line, or a low water level in the well.

Common Reasons a Well Pump Runs but No Water Comes Out

When a pump is running and the faucets stay dry, the problem is usually in one of a few places: the pump itself, the pressure system, or the well supply. In Central Florida, shallow and deep wells can both act up for different reasons, so the fix depends on the type of system you have.

A few common causes include:

• Loss of prime in a jet pump system
• Broken pump parts such as impellers or seals
• Bad pressure switch or control issue
• Clogged intake, screen, or line
• Low water level in the well
• Air leak in suction piping
• Electrical problems causing the pump to spin but not move water

If the issue is electrical, or if your system includes a pressure tank or deeper well equipment, call for service rather than trying to troubleshoot it yourself.

Pump Problems That Can Stop Water Flow

At Dunham Well Drilling, we handle pump repair and installation for residential, irrigation, commercial, and industrial systems. A pump can sound like it is working while still failing to move water if internal parts are worn or damaged.

Failed pump components

If an impeller is broken, worn down, or clogged with debris, the pump may still run but produce little or no water. Seals can also fail, letting water escape inside the system instead of sending it to your home or irrigation lines.

We repair and rebuild pumps in-house with our full-line machine shop, which helps us diagnose problems and handle many repairs without guessing.

Pressure switch or control issues

A pressure switch tells the pump when to turn on and off. If that switch is bad, misadjusted, or affected by lightning damage, the pump may run at the wrong time or fail to build usable pressure.

If lightning damaged your well system, our Lightning Damage Repair service covers pump and motor repair, electrical repair, pressure-switch replacement, and well casing assessment.

Well and Water Supply Issues

Sometimes the pump is fine, but the well itself is not supplying water properly. That is common in systems with changing water levels or older wells that need inspection.

Low water level or dry conditions

If the water level drops below the pump intake, the pump can run without delivering water. That can happen in shallow wells, during dry periods, or if the well was not sized correctly for the demand.

For irrigation-heavy properties, a Shallow (2-Inch) Irrigation Well can be a cost-effective option when the site conditions support it.

Clogged or restricted piping

Mineral buildup, sediment, or a blocked intake can reduce water flow enough that the pump appears to run normally. In some cases, the line may be partially blocked and still let enough water move to mask the real issue for a while.

That is one reason on-site diagnosis matters. We offer Water Filtration & Treatment and can test the water to see whether iron, sulfur, or other conditions are affecting your system.

Pressure Tank and System Troubles

If your pressure tank is waterlogged, damaged, or incorrectly set up, your system may not move water the way it should. Pressure tanks are part of many well systems, and problems there can look like pump failure.

Signs of pressure-system trouble include:

• Pump runs longer than usual
• Water starts and stops quickly
• Low or no pressure at fixtures
• Pump cycles without building pressure

We service pressure tanks as part of our pump work, and we install them on new well jobs as needed. If your tank or pressure system is involved, do not try to open or rewire it yourself.

What You Can Check Before Calling

There are a few simple things you can observe safely:

• Check whether the breaker has tripped
• Look for obvious leaks around visible piping
• Note whether the system has any water pressure at all
• Listen for unusual pump noise
• Check whether the problem started after a storm or lightning event

Do not open electrical panels, disassemble the pump, or work on pressure equipment yourself. If your well is down, especially if it supplies drinking water or serves a mobile-home park, call for help.

When to Call Dunham Well Drilling

If you have a well pump running but no water in Winter Haven, Polk County, or the surrounding Central Florida area, we can help find the cause and fix it. We have served this region since 1950, are a Licensed Water Well Drilling Contractor, and are a Florida Ground Water Association member.

We handle pump repair, water well drilling, water filtration, irrigation repair, lightning damage repair, and well abandonment. We also carry Goulds, Sta-Rite, Grundfos, and Schaefer pumps, new and used, and we rebuild pumps and turbines in-house.

Call Dunham Well Drilling at (863) 965-2881 when your pump runs but no water comes out, when you suspect lightning damage, or when your pressure tank or well system needs professional service. Our 24/7 answering service is always live, and calls are returned within 48 hours.