Your well pump sits 100–300 feet underground, out of sight and out of mind — until something goes wrong. The good news: most pump failures give warning signs weeks or months before complete failure. Recognizing these signs early means the difference between a scheduled service call and an emergency with no water at 2 a.m.
After 15+ years pulling and servicing well pumps across Central Florida, these are the five warning signs I see most often — and what each one means for your system.
Sign 1: Sputtering Air at Your Faucets
If your faucets spit air — bursts of water mixed with air rather than a smooth, continuous stream — something is allowing air into your water supply line. This is never normal for a properly functioning well system.
What causes it:
- Failing check valve in the pump allowing water to drain back and air to enter the drop pipe
- Water table has dropped below the pump intake (the pump is drawing air because it's partially exposed)
- Cracked or corroded pump housing allowing air infiltration
- A leak in the drop pipe above the water line
What to do: Call for service. Running a pump that's drawing air accelerates motor damage because the motor relies on water flow for cooling. A pump running dry — even intermittently — can burn out within days.
Sign 2: Rapid Pressure Cycling (Short Cycling)
Normal operation: your pump turns on, runs for 1–3 minutes to fill the pressure tank, then shuts off and stays off until the tank pressure drops from use. If your pump is cycling on and off every few seconds or every 10–15 seconds, it's short-cycling.
What causes it:
- Waterlogged pressure tank (most common): The bladder inside your pressure tank has failed, so there's no air cushion to maintain pressure between pump cycles. The tank fills completely with water, pressure drops instantly when you open a faucet, and the pump kicks on again immediately.
- Pressure switch malfunction: The switch that tells the pump when to start and stop may have corroded contacts or incorrect settings.
- Check valve failure: Water flowing backward through a failed check valve drops system pressure immediately after the pump shuts off.
Why it matters: Short cycling destroys pumps fast. Every time a submersible pump motor starts, it draws 3–5x its running amperage. A pump designed for 6–8 starts per hour that's cycling 30–60 times per hour will burn its start winding or capacitor within weeks. A $300 pressure tank replacement ignored becomes a $2,000+ pump replacement.
Sign 3: Dirty or Discolored Water
If your well has been producing clear water and suddenly starts delivering rusty, sandy, or cloudy water, something has changed in your well system.
Possible causes:
- Corroding pump components: An aging pump housing or drop pipe corroding from the inside produces rust particles in your water. This typically indicates the pump is at or past end-of-life.
- Failed sand screen: The screen at the pump intake that prevents sand from entering has corroded through or shifted, allowing aquifer sand into the system.
- Well casing breach: A crack or perforation in your well casing above the water table can allow surface water, soil, or shallow groundwater to enter the well — bringing sediment, bacteria, and contaminants.
- Pump shifted position: If the pump has slipped on the drop pipe, it may be drawing from the gravel pack rather than the open water column.
What to do: Stop using the water for drinking until tested. Sand in the water indicates immediate service is needed — sand is abrasive and will damage pump impellers, pressure tanks, and household fixtures rapidly.
Sign 4: Noticeably Higher Electric Bills
Your well pump is one of the larger electrical loads in your home. A 1 HP submersible pump in good condition draws approximately 10–12 amps at 230V when running. A pump fighting mineral scale, worn impellers, or failing motor windings draws more amperage and runs longer to deliver the same flow.
What to look for: A $20–$40 increase in your monthly electric bill without corresponding usage changes (no new appliances, same household size, same season). This is particularly common in Central Florida where hard water scale accumulates on pump internals over years.
Why it happens: Scale-insulated motor windings run hotter and less efficiently. Worn impeller stages can't move water as effectively, so the pump runs longer per cycle. A failing check valve causes the pump to run extra cycles to maintain pressure. All of these increase your electrical consumption before any other symptoms become obvious.
Sign 5: Strange Noises From the Pressure Tank Area
You shouldn't hear your well system during normal operation — submersible pumps are underground and essentially silent. If you're hearing noises, something is wrong:
- Clicking: Rapid clicking from the pressure switch indicates short cycling (see Sign 2) or a switch with burned contacts trying to make connection.
- Humming or buzzing: A pump motor that hums but doesn't start may have a failed start capacitor or be mechanically seized. This requires immediate attention — a motor drawing locked-rotor current will overheat rapidly.
- Water hammer (banging pipes): Sudden pressure surges when the pump starts or stops indicate a check valve problem or waterlogged pressure tank.
- Continuous running: If you can hear the pump running non-stop (listen near the wellhead), it may be unable to build pressure — indicating a major leak, failed foot valve, or significantly worn impellers.
Central Florida-Specific Pump Killers
Three factors make Central Florida particularly hard on well pumps:
Lightning: Central Florida has one of the highest lightning strike densities in the country. Voltage surges from nearby strikes damage pump motors, control boards, and capacitors. Surge protection at the pump panel is a worthwhile investment — a $100–$200 surge protector can save a $2,000 pump replacement.
Hard water scale: The Floridan Aquifer delivers 15–40+ GPG of hardness. Over years, calcium carbonate deposits on impeller stages, motor housings, and check valves — reducing efficiency and accelerating mechanical failure. Pumps in Central Florida's hardest water zones rarely reach their rated 12–15 year lifespan.
Sandy conditions: Sandy soils in some Central Florida locations can cause sand infiltration through well screens, particularly in older wells where the gravel pack has shifted. Sand is abrasive and wears pump impellers rapidly.
What to Expect From a Service Call
When you call Quality Filters And Pumps for a pump assessment, here's the process:
- Electrical diagnostics: We check amp draw, voltage, and motor resistance at the wellhead — this tells us motor condition without pulling the pump.
- Pressure system check: We test tank pre-charge, pressure switch operation, and check valve function.
- Flow test: We measure actual gallons per minute against the pump's rated capacity to assess impeller wear.
- Recommendation: Based on diagnostics, we provide an honest assessment — repair what makes sense, recommend replacement when the numbers support it.
Quality Filters And Pumps has served Central Florida — Marion, Alachua, Orange, Lake, Citrus, and surrounding counties — for over 15 years. Chase Norris and the team have pulled thousands of pumps from Central Florida wells. If your system is showing any of these warning signs, call (352) 268-9048 before a minor issue becomes an emergency.