Common Well Pump Problems and How to Fix Them
Most well pump problems fall into 8 categories, and most homeowners deal with at least one over the life of their system. The good news: three of the eight are straightforward DIY fixes costing $25–$200. The rest range from calling a plumber to a full pump replacement ($300–$2,000). We cover more ground than the standard 5 common well pump problems{:target=“_blank”} lists — adding air sputter, high electric bills, and a clear DIY/pro threshold for every symptom. Use the quick-reference table below to match your symptom to a cause, then read the matching section for cost and fix details.
| Problem | Most Likely Cause | DIY Fix? |
|---|---|---|
| No water at all | Tripped breaker, failed well switch, or pump failure | Breaker check: yes. Pump pull: pro only |
| Low water pressure | Waterlogged pressure tank, failing pump impeller | Tank check: DIY. Pump: pro |
| Short cycling (rapid on/off) | Waterlogged tank or bad pressure switch | Tank or switch: DIY. Pump: pro |
| Pump runs continuously | Stuck pressure switch, leak, low well level | Switch swap: DIY. Underground issues: pro |
| Noisy pump or tank | Air in lines, worn motor bearings | Air purge: DIY. Motor: pro |
| Discolored or cloudy water | Sand intrusion, casing damage, bacteria | Test water first; filtration: DIY |
| High electric bills | Short cycling, aging motor | Diagnose root cause first |
| Air spurting from faucets | Waterlogged tank, well drawing low | Tank check: DIY. Well level: pro |
Before diving into each problem, this 10-minute video from This Old House gives a solid overview of how the whole system works together.
Video: “How to Diagnose Problems with Well Water Systems” by This Old House
No Water From the Tap
Symptom: Faucets run completely dry — no pressure at all.
Causes (most to least common): tripped or blown breaker → failed well switch near the pressure tank → pump motor failure → broken underground water line.
The first step when a well stops producing water is to check the breaker panel. A tripped double-pole breaker is the most common and easiest-to-fix cause of sudden water loss. Reset it by pushing it all the way to OFF, then firmly to ON. If it trips again immediately after reset, stop — the pump motor is likely failed and requires professional service. Repeated resets can damage wiring and make the repair more expensive.
Also check the well switch near the pressure tank — homeowners accidentally knock it off without realizing it.
When to call a pro: Breaker trips again on reset; breaker is fine but water doesn’t return; pump hums but doesn’t run.
Low Water Pressure
Symptom: Noticeably weaker flow, showers feel weak, two fixtures can’t run simultaneously.
Causes: waterlogged pressure tank (most common), undersized pump, failing impeller, mineral buildup in pipes.
A waterlogged pressure tank is when the internal bladder ruptures, the tank fills with water, and the air cushion that maintains steady pressure between pump cycles disappears. Two quick checks confirm it: rock the tank from the top — a waterlogged tank feels uniformly heavy and won’t shift. Or press the Schrader valve (the air valve on top) with a screwdriver tip — water discharge instead of air confirms it.
A waterlogged pressure tank cannot be repaired, only replaced. Replacement costs $200+ for the tank, plus $150–$350 for installation.
When to call a pro: Tank checks out fine but pressure is still low — the pump impeller or well yield is likely the issue.
Short Cycling (Pump Turns On and Off Rapidly)
Symptom: You can hear the pressure switch clicking every few seconds; the pump runs in short bursts.
Causes: waterlogged pressure tank (most common), failed pressure switch, undersized tank.
Short cycling matters beyond being annoying. A pump that starts 100+ times per day instead of the normal 10–15 times stresses the motor windings on every start cycle and shortens pump lifespan significantly. Catching it early is worth the effort.
Check the pressure tank first using the rock test and air valve test described in the Low Pressure section above. If the tank is fine, the pressure switch is the next candidate — a replacement costs about $25 and is within DIY scope. For a deeper diagnosis of switch failure modes, see our pressure switch problems guide.
When to call a pro: Tank and switch are both fine; likely a pump sizing or well yield issue.
Pump Runs Continuously Without Shutting Off
Symptom: Pump never shuts off; electric bill spikes; pressure switch clicks without pressure building.
Causes: stuck pressure switch, major leak in the water line, failed check valve, pump losing prime, low well level.
Listen for repeated pressure switch clicking with no pressure response — that pattern indicates the problem is not inside the house. Family Handyman’s diagnostic confirms: continuous pump operation without water flow points to broken water lines, failed check valves, or a damaged well casing connector — all underground issues.
A pump running 24/7 can add $50–$150/month to the electric bill. Shut the pump off to prevent motor burnout while you wait for a contractor.
Noisy Well Pump or Pressure Tank
Symptom: Banging, rattling, grinding from the pump or tank; gurgling from the pipes.
Causes: air in lines (banging/gurgling), worn motor bearings (grinding), loose mounting hardware (rattling), cavitation.
The noise type is the diagnostic. Banging or gurgling is usually air in the lines — run water until it purges; check tank air pressure with a tire gauge at the Schrader valve. Grinding points to worn motor bearings — a serious sign that warrants a service call. Constant humming without water flow means the motor is running against resistance, which overheats it fast.
As Kocher Geo Well Drilling notes, noisy pump operation and air trapped in the system are distinct problems that look the same from the homeowner’s perspective — the tire gauge test separates them.
When to call a pro: Grinding or persistent humming; banging that doesn’t clear after purging air.
Discolored, Cloudy, or Bad-Smelling Water
Symptom: Brown or rust-colored water, cloudy white water, rotten-egg smell, or metallic taste.
Causes by appearance:
- Brown/rust: iron bacteria, corroding casing, or pump drawing from a low well level with settled sediment
- Cloudy white: air in lines (harmless, dissipates in a glass) or surface water intrusion (serious)
- Rotten egg smell: hydrogen sulfide bacteria — requires a water test to confirm
- Metallic taste: corrosion in the pump housing or casing
First step: test the water. Sediment and discoloration can indicate a failed check valve pulling sand from the well bottom, a corroded casing, or bacterial contamination — and the fix differs for each. The EPA private well guidelines{:target=“_blank”} recommend testing before treating so you know what you’re actually addressing.
DIY scope: point-of-use sediment or iron filters are homeowner-installable. Bacterial contamination requires well shock chlorination.
Unusually High Electric Bills
Symptom: Utility bill is 15–25% higher than normal with no other obvious explanation.
Causes: short cycling (pump starting 100+ times/day instead of 10–15), aging motor drawing excess current, pump working against undersized pipes.
A well pump motor draws 750W–1,500W depending on horsepower. A pump that short-cycles runs its startup surge many more times per day than designed — which roughly doubles consumption in severe cases. The diagnostic is to listen for short cycling (the rapid clicking described above) and check the pressure tank.
If the pump cycles normally but the bill is still high, pump age is the likely culprit. An aging motor runs at lower efficiency and draws more current to maintain the same output. At 10+ years, replacement is often more cost-effective than continued operation.
Air Spurting From Faucets
Symptom: Water sputters with air bursts, especially right after the pump runs; intermittent spitting from taps.
Causes: waterlogged pressure tank (bladder failed, air pocket shifts erratically), well drawing near its low-water level and pulling air, air introduced by a recent repair.
Timing is the key diagnostic: air that appears only right after the pump cycles almost always traces to the pressure tank — the failed bladder allows air pockets to shift into the water line. Persistent air with every draw suggests the well level is dropping and the pump is occasionally pulling air from above the water line.
Check the pressure tank first using the rock test and air valve test. A waterlogged tank costs $200+ to replace. A dropping well level is a different problem — it requires a well driller to assess water table depth, not a plumber.
FAQ
What is the most common well pump problem?
Low water pressure caused by a waterlogged pressure tank is the most common well pump complaint we see. When the tank’s internal bladder fails, the tank fills with water and loses the air cushion that maintains steady pressure between pump cycles. Replacing the tank ($200–$400) restores normal pressure in most cases without touching the pump itself.
How do I know if my well pump is going bad?
The clearest signs are sudden pressure loss, short cycling (rapid on/off clicking you can hear), the pump running continuously without building pressure, or unexplained spikes in your electric bill. A pump that struggles to maintain 40–60 PSI despite a healthy pressure tank and pressure switch is likely failing. Two technician calls in 18 months is a reliable indicator the pump is in decline.
What are the two most common reasons a well pump fails?
Electrical failure — tripped breaker, failed capacitor, or worn motor windings — and mechanical failure — worn impeller or damaged motor bearings — account for the majority of well pump failures. Electrical issues are often diagnosable with a multimeter or a $25 pressure switch swap. Mechanical failures in a submersible pump require pulling it from the well, which means a licensed contractor. For more detail, see the well pump troubleshooting and DIY repair{:target=“_blank”} breakdown from Family Handyman.
Can I repair my well pump myself?
Above-ground components are within DIY reach: pressure switches ($25), pump controllers ($75), and pressure tanks ($200+) are all accessible and replaceable with basic tools. The pump motor itself — and anything underground, including the check valve, drop pipe, and the pump body on a submersible — requires a licensed well contractor. See our well pump maintenance checklist for the components worth inspecting yourself on an annual basis.
Our complete well pump repair hub covers the full diagnostic path when you’re ready to go beyond identifying the problem.