7 Warning Signs Your Well Pump Needs Repair (Before It Fails Completely)

Well pump failures don't typically happen without warning. There are almost always symptoms that precede complete failure — if you know what to look for. The challenge is that these symptoms are easy to rationalize away ("the water pressure was always a bit low...") until the day you turn on the tap and nothing comes out.

How Residential Well Pumps Work

Most Central Florida homes use submersible well pumps — electric motors sealed inside waterproof housings, installed deep in the well below the water table. They push water up through a drop pipe to a pressure tank near your home, maintaining system pressure typically between 40 and 60 PSI. The pressure tank has a bladder or diaphragm that provides a small water reserve and prevents the pump from short-cycling (turning on and off rapidly).

Submersible pumps are designed for 15–25 year lifespans with proper maintenance. In practice, Central Florida wells push these pumps hard — high mineral content, variable water levels during drought periods, and the frequency of large-volume irrigation demands all reduce service life. Many pumps in our service area need replacement at 10–15 years.

Warning Sign #1: Low or Fluctuating Water Pressure

This is often the first symptom homeowners notice. Gradual pressure decline over months may indicate pump wear, partial clogging of the intake screen, or a developing pressure tank issue. Sudden pressure drops often indicate impeller wear, bearing failure, or partial pipe obstruction.

If your pressure gauge (installed on the tank or pressure switch) shows normal tank pressure but you experience low flow at fixtures, the problem is likely the pressure tank bladder, not the pump itself. If tank pressure is low and the pump runs constantly, the pump is losing capacity.

Warning Sign #2: Pump Runs Constantly (or Very Frequently)

Your pump should cycle on and off based on water usage, running for several minutes at a time. If the pump runs constantly or cycles on every few minutes even when no water is being used, three possibilities exist:

• Pressure tank bladder failure: The rubber bladder develops a leak, causing waterlogged tank syndrome — the tank fills completely with water, leaving no air cushion, and the pump must turn on for even the smallest water draw
• Check valve failure: The check valve prevents water from flowing back down the well when the pump shuts off. A failed check valve allows backflow, dropping system pressure and triggering frequent pump cycles
• Plumbing leak: A leak in your home's plumbing causes continuous pressure loss, keeping the pump running

Continuous pump operation dramatically shortens motor life and should be diagnosed immediately.

Warning Sign #3: Sputtering or Air in Water Lines

If air is coming from your faucets along with water, the pump is drawing air — usually indicating the water level in the well has dropped below the pump intake, or the pump is installed at the wrong depth. During drought conditions in Central Florida, this is a known issue with shallower wells in the intermediate aquifer zone.

Other causes include a cracked drop pipe allowing air entry or a failed pump seal. Continued operation with air ingestion damages the pump motor through overheating and mechanical wear.

Warning Sign #4: Discolored or Sandy Water

Rust-colored water (red-brown) typically indicates pump impeller corrosion or iron bacteria growth in the well. Milky or gray water can indicate mineral scale formation inside the pump. Sand or grit in the water suggests the intake screen has failed and the pump is drawing sediment — this causes rapid impeller wear and will destroy the pump quickly if not addressed.

New sediment appearance in a previously clean well can also indicate the well has been "sand-locked" — a collapse of the formation around the borehole — which requires well rehabilitation before pump repair will be effective.

Warning Sign #5: Abnormally High Electricity Bills

A well pump in declining health works harder to maintain the same output. If your electricity bills have increased without an obvious cause (new appliances, more household members), and you're on a well, check the pump. A worn pump motor that used to draw 8 amps may now draw 12 amps to deliver the same flow — a 50% increase in operating cost.

Your breaker box showing the pump circuit breaker tripping occasionally is a related warning sign — the motor is overloading its designed amperage draw.

Warning Sign #6: Visible Age or Corrosion on Above-Ground Components

The pressure tank, pressure switch, gate valves, and wiring above ground give you visible indicators of system health. Corrosion on the pressure tank exterior, visible mineral deposits on fittings, or wiring that shows weathering or rodent damage all indicate a system that deserves professional inspection.

Pressure switches are particularly wear-prone components — these spring-loaded electrical contacts turn the pump on and off thousands of times per year and typically need replacement every 5–10 years. A failing pressure switch can cause irregular pump operation or fail to shut the pump off, potentially overrunning the pump until it burns out.

Warning Sign #7: Unusual Sounds

Grinding, knocking, or screeching sounds from the well casing, pressure tank, or pump motor area indicate mechanical issues. Submersible pump bearings that are failing create noise that travels up the drop pipe. A pressure tank with internal corrosion can develop rattling.

Note that some noise at pump startup is normal — it's sounds during operation or immediately after shutdown that deserve attention.

When to Call vs. When to Wait

If you're experiencing Warning Signs 3, 4, or 7, call for service immediately — these indicate active damage occurring to the pump. Signs 1, 2, 5, and 6 give you a window of days to weeks to schedule service before the situation becomes an emergency.

Quality Filters and Pumps provides same-week service for non-emergency pump issues and emergency service for no-water situations. We stock the most common Central Florida pump brands and sizes for same-day replacement when needed.