Free Repair Guides

What Is Your Pump Doing?

Pick your symptom below and get straight to the fix — written by a 39-year repair veteran, no fluff.

Pick Your Symptom

  • Won’t Stay PrimedPump runs but never builds suction — 7 causes from O-rings to air leaks, in the order to check them.Fix It →
  • Leaking WaterWhere it drips tells you the fix — shaft seal, lid O-ring, union fittings, or cracked housing.Fix It →
  • Motor Needs ReplacementHow to match the replacement motor and do the swap yourself — saves $150–300 in labor.Fix It →
  • Above-Ground Pool PumpAbove-ground pumps fail differently — priming, filter clogs, thermal trips, and Intex-specific fixes.Fix It →
  • Impeller CloggedPump sounds fine but pressure gauge reads near zero — a clogged impeller is a free fix in 20 minutes.Fix It →
  • Keeps Losing PrimePrimes fine then loses suction after 10–20 minutes — almost always a slow air leak on the suction side.Fix It →
  • Making NoiseGrinding, screeching, rattling, or humming — the sound tells you exactly what’s wrong and what it costs to fix.Fix It →
  • Overheating / Shuts OffPump runs 20–45 minutes then shuts itself off — thermal overload is tripping from one of 6 fixable causes.Fix It →
  • Pentair SuperFlo ProblemsModel-specific fixes for the SuperFlo — won’t start, hums, trips breaker, leaks, weak flow.Fix It →
  • Making a NoiseGrinding means bearings. Humming means capacitor. Rattling means impeller debris. Match your sound to the fix.Fix It →
  • Need to Replace the Pump?Full cost breakdown — single-speed $200–450, variable-speed $600–1,100. Plus when to repair vs replace.See Costs →
  • Air Bubbles in ReturnsBubbles from return jets mean a suction-side air leak. The shaving cream test finds it fast.Fix It →
  • Booster Pump ProblemsPolaris and cleaner booster pump issues — separate from your main circulation pump.Fix It →
  • Spa/Hot Tub Pump IssuesNo flow, noise, and FLO error codes on attached spa pumps.Fix It →
  • Intex Pump ProblemsCommon fixes for Intex above-ground and inflatable pool pumps.Fix It →
  • Timer Not WorkingMechanical tripper issues and digital timer programming fixes.Fix It →
  • Salt Water Pump IssuesWhat’s different about pumps feeding a salt chlorine generator.Fix It →
  • VS Pump TroubleshootingError codes, drive faults, and speed control issues.Fix It →
  • Won’t Restart After OutageGFCI tripped, surge fuse blown, or timer lost programming.Fix It →
  • High PressureFilter pressure too high — backwash or clean fixes 60% of cases.Fix It →
  • Vibrating ExcessivelyLoose mounting, chipped impeller, or bad bearings.Fix It →
  • Burning SmellShut it off now. What each smell type means and what to do.Fix It →
  • Wiring Guide115V vs 230V configuration, GFCI requirements, terminal block.Fix It →
  • Cloudy Water Despite RunningPump runs fine but water stays cloudy — almost always filter or chemistry.Fix It →
  • Freeze DamageCracked housing after a freeze — assess and decide repair vs replace.Fix It →
  • How Long to Run ItCalculate the right daily run time for your pool size.Fix It →
  • VS Pump DiagnosisGeneral variable-speed diagnosis across all brands.Fix It →
  • Sta-Rite TroubleshootingDyna-Pro, Max-E-Pro, and IntelliPro fixes.Fix It →
  • Winterization GuideHow to properly shut down for winter without freeze damage.Fix It →
  • Hayward VS ProblemsEcoStar and MaxFlo VS error codes and fixes.Fix It →
  • Motor Bearings FailingGrinding and screeching — confirm bearing failure and what to do.Fix It →
  • Diffuser ProblemsWeak flow with low pressure even after cleaning the filter.Fix It →
  • Won’t Start After WinterSpring startup sequence and the 5 reasons pumps fail to restart.Fix It →
  • Strainer Basket IssuesCracked basket, bad lid O-ring, or clogged — all quick fixes.Fix It →
  • Pressure Gauge GuideHow to read it and when a stuck gauge needs replacing.Fix It →
  • Two-Speed Pump IssuesStuck on one speed or neither speed working.Fix It →
  • Low PressureBelow baseline pressure — 6 causes in order, starting with the basket.Fix It →
  • Check Valve ProblemsLosing prime overnight or water draining back after shutoff.Fix It →
  • How to Prime ItThe correct fill-and-start sequence for every pump situation.Fix It →
  • Electricity CostWhat your pump actually costs to run and how to cut the bill.Fix It →
  • Installation GuideHow to install a new pump yourself — plumbing and wiring.Fix It →
  • Maintenance ScheduleWeekly to annual tasks that prevent 90% of failures.Fix It →
  • Jandy TroubleshootingStealth single-speed and VS FloPro fixes.Fix It →
  • Waterway TroubleshootingExecutive series and Waterway-specific part notes.Fix It →
  • Seal Plate ReplacementWhen a worn seal plate causes repeat shaft seal failures.Fix It →
  • Starts Then StopsTiming of the shutdown narrows down the cause fast.Fix It →
  • DE Filter ProblemsDE powder returning to the pool, torn grids, dosing errors.Fix It →
  • Flow Rate (GPM) GuideCalculate the GPM your pool actually needs.Fix It →
  • GFCI Keeps TrippingDon’t keep resetting it — 5 causes of a real ground fault.Fix It →
  • CavitationThat rushing/gravel sound means the pump can’t get enough water.Fix It →
  • Repair Cost GuideWhat every common repair should cost — DIY vs pro.Fix It →
  • Single vs Variable SpeedThe real cost comparison with numbers.Fix It →
  • Sand Filter ProblemsHigh pressure, cloudy water after backwash, sand in pool.Fix It →
  • Plumbing GuideUnion fittings, pipe sizing, and common plumbing problems.Fix It →
  • Pentair WhisperFloSingle-speed and VS/VST WhisperFlo fixes.Fix It →
  • Cover Pump IssuesA different pump entirely — winter cover water removal.Fix It →
  • Multiport Valve ProblemsLeaking, stuck, or wrong-position — almost always the spider gasket.Fix It →
  • Pump Sizing for SolarAdding solar heating? You almost always need a bigger pump.Fix It →
  • What Size Pump Do I NeedBuying guide — size by pool volume without overbuying.Fix It →
  • Return Jets Not WorkingStuck eyeballs, missing inserts, cracked faceplates.Fix It →
  • Skimmer vs Main DrainIsolate which suction source is actually restricted.Fix It →
  • Rebuild Kit — Worth It?When a full rebuild kit beats buying individual parts.Fix It →
  • AO Smith/Century MotorsCross-reference your motor regardless of pump brand.Fix It →
  • Multimeter Testing GuideTest the capacitor and motor windings before buying parts.Fix It →
  • Won’t Turn OffStuck timer, welded relay, or automation override.Fix It →
  • Automation IntegrationHayward, Pentair, and Jandy app control explained.Fix It →
  • Suction vs Pressure SideThe foundation concept behind every diagnosis on this site.Fix It →
  • Warranty GuideWhat’s covered, what voids it, how to file a claim.Fix It →
  • Troubleshooting FlowchartMatch your symptom to the right fix in under a minute.Fix It →
  • Sizing for New ConstructionGet plumbing and pump decisions right before they’re locked in.Fix It →
  • LED Light Indicator CodesWhat flashing red/green status lights mean on simpler pumps.Fix It →
  • Drain Plug StuckHow to remove a stuck plastic plug without stripping it.Fix It →
  • O-Ring Sizes GuideIdentify and order the correct O-ring for each location.Fix It →
  • Inground vs Above-GroundWhat actually differs between pump types — and can you swap them.Fix It →
  • Don’t See Your Symptom?

    Browse the full troubleshooting guide, check the articles index, or send me your question directly — I read every one.

    Explore More