Well Pump Repair or Replacement: How to Tell the Difference

How a Well Pump Fails

Well pumps rarely quit all at once. More often, they degrade over months or years. You get low pressure that used to be fine. A pump that runs longer than it should. Water that sputters with air. These are the early signs, and most homeowners chalk them up to something else until one morning they turn on the tap and nothing comes out.

The sudden failure does happen too. North Georgia gets frequent summer thunderstorms, and a direct hit or close lightning strike can fry the pump motor instantly. That kind of failure is obvious and immediate. Surge protection on the pump circuit is cheap insurance against it.

Most of the calls I get are the slow kind. Someone has been dealing with weak pressure for six months, maybe a year, and they finally got tired of it.

What the Symptoms Actually Mean

Low or Dropping Pressure

This one has three possible causes: the pump, the pressure tank, or something in between. Low pressure across all fixtures at once points toward the pump or tank. Low pressure at one fixture with normal pressure everywhere else points to a local issue, a partially closed valve, a clogged aerator, or a failing fixture. You have to separate the system from the fixture before you start chasing the pump.

Sputtering and Air in the Lines

Air in your water lines almost always means the pressure tank bladder has failed. The tank has a rubber bladder inside that separates the water from the air charge. When that bladder ruptures, air gets into the water side and you get spitting, sputtering water at the tap. This is usually a pressure tank problem, not a pump problem. Tank replacement is much cheaper than a pump.

The exception: if your well is drawing down and the pump is pulling air in from the bottom of the casing, you also get air in the lines. That is a different problem and a more serious one. It means the water table is low or the pump is installed too high in the casing.

Short Cycling

If the pump kicks on and off every few seconds, that is almost always the pressure tank. The bladder is shot, the tank has no air charge left, and the pump has to run constantly to maintain pressure. You can confirm this by tapping on the tank. A healthy tank sounds hollow in the lower portion. A waterlogged tank sounds solid all the way down. Replace the tank, and in most cases the cycling stops immediately.

No Water At All

Turn on every tap. Nothing. The first thing to check is not the pump, it is the breaker. Pump breakers trip. Reset it and wait two minutes. If pressure comes back and holds, you may have just had a tripped breaker and nothing more.

If the breaker is fine, or if it trips again immediately, the problem is electrical or mechanical. A burned-out motor, a failed capacitor, or a control box issue. Some of these are repairable. Some mean the pump is gone.

Pressure Tank Failure vs. Pump Failure: How to Tell Them Apart

This is the most common diagnostic question I get. Here is a simple way to check before you call anyone:

1. Turn off power to the pump at the breaker.
2. Open a faucet and let it run until pressure drops to zero.
3. Find the Schrader valve on the pressure tank (looks like a tire valve) and check the air pressure with a tire gauge. It should read 2 psi below your cut-in pressure, typically 28 psi for a 30/50 system.
4. If you get no air reading, or if water sprays out of the valve, the bladder is shot and you need a new tank, not a new pump.
5. If the air charge is correct but you still have no pressure, the problem is the pump or the electrical system.

A waterlogged pressure tank is by far the most common thing I see when people think their pump is failing. It is also the cheapest fix. Do not skip that step.

When to Repair and When to Replace

A caller last January had a 12-year-old submersible pump with weak pressure. The pump was still running but clearly struggling. I pulled it and found the motor winding was starting to break down. We had a choice: rewind or replace the motor, or put in a new pump. For a modest difference in cost, the homeowner got a pump with a full lifespan instead of a rebuilt one on an aging system.

That math changes depending on pump age and type. Here is the general rule I use:

• Under 7 years old: Repair almost always makes sense, assuming the failure is a discrete component, a capacitor, a pressure switch, a control box.
• 7 to 12 years old: Evaluate repair cost against replacement cost. If repair is more than 50 percent of replacement, replace.
• Over 12 to 15 years: Replace. Submersible pumps have a service life of 10 to 15 years in normal conditions. Repairing an old pump buys you months, not years.

Well depth matters too. A pump at 80 feet is relatively easy to pull and service. A pump at 350 feet in a mountain well is a full day of work just to get it out of the ground. Labor costs on deep wells shift the calculation.

What a Replacement Involves in North Georgia

Mountain wells in Gilmer and Pickens County tend to run deep. In the ridge and valley geology up here, you often see wells at 150 to 400 feet, sometimes deeper. The water table sits below the rock, and you are pulling from bedrock fractures rather than a sandy aquifer.

Pulling a submersible pump from a deep well requires a pump puller or a truck-mounted rig. It is not a ladder-and-hand-line job at those depths. The drop pipe comes up in sections, and the wire has to be managed as it comes out. Then the new pump goes in the same way, in reverse.

On a typical residential replacement in this area: figure 4 to 8 hours of labor depending on depth, plus parts. Cost increases if the drop pipe or wire needs replacing too. Call for a free estimate once we know the depth and system details.

Vacation cabins and mountain properties sometimes have additional complications: older pitless adapters that have never been serviced, well casings that are not properly sealed, or pressure tanks in crawl spaces that have not been touched in 20 years. Plan for a full system evaluation if the property is older or has never had professional service.

What to Do Before You Call

Check the breaker first. Always. Then check whether pressure is truly gone from every tap or just some. Then tap on the pressure tank and check the air charge if you can. That three-minute diagnosis can tell you whether you need a new tank or a pump replacement, and it will save you money on the service call because I can pull the right parts before I arrive.

If you have no water at all and the breaker is fine, call now. A failed pump in North Georgia means no water for drinking, cooking, toilets. That is not something to wait on.