Well Pump Maintenance Schedule: When and How to Care for Your Pump

Monthly Monitoring Tasks

Monthly checks take just 5 minutes but provide early warning of developing problems. Make these observations part of your routine—the first of each month works well for most homeowners.

Listen to Your Pump: When your pump runs, listen for any changes in sound. A healthy submersible pump should be nearly silent from inside the house. Grinding, humming that doesn't start, or unusual vibrations indicate bearing wear or motor problems. Changes happen gradually, so monthly attention helps you notice before failure.

Monitor Water Pressure: Does pressure feel consistent throughout the month? Note if showers feel weaker, if the pump seems to run longer, or if pressure fluctuates during use. These changes often indicate pump wear, dropping water levels, or pressure tank issues developing.

Check Your Electric Bill: A sudden increase in electricity usage (without other explanations) can indicate a pump motor working harder due to wear, blockages, or dropping water levels. Pumps typically use 1-2 kWh per 1,000 gallons—significant increases warrant investigation.

Quarterly Maintenance

Every three months, perform slightly deeper checks on your system's electrical and mechanical components. These quarterly tasks catch developing problems before they cause failures.

Pressure Switch Inspection: Turn off power to the pump and remove the pressure switch cover. Look for pitting, burning, or corrosion on the contact points. Light pitting is normal; heavy deposits or melted plastic indicate the switch is failing. Clean contacts gently with fine sandpaper if needed, or replace the switch ($15-40 part) if contacts are badly worn.

Electrical Connection Check: With power OFF, visually inspect wire connections at the pressure switch and control box. Look for discoloration indicating heat, loose connections, or signs of corrosion. Burned or melted wire insulation requires immediate professional attention. Check that conduit connections are secure and waterproof seals are intact.

Pressure Gauge Verification: Pressure gauges can fail or become inaccurate. Compare your gauge reading against a known-good gauge (a tire pressure gauge works for a rough check at the tank air valve). If the gauge reads significantly off, replace it—they're inexpensive ($10-20) and critical for system monitoring.

Annual Deep Maintenance

Once per year, perform a thorough system evaluation. Some of these tasks require professional equipment—consider scheduling a professional inspection to cover the items you can't do yourself.

Amp Draw Testing: This is the single best indicator of pump motor health. Using a clamp meter, measure the running amps and compare to the motor nameplate rating. Amps significantly below normal suggest worn pump impellers or low water. Amps above normal indicate bearing wear, voltage problems, or pump blockage. This test requires electrical knowledge and equipment—we recommend professional testing.

Control Box Service (3-Wire Systems): If you have a 3-wire pump system (with an above-ground control box), have the capacitors tested annually. Capacitors degrade over time and weak capacitors strain the motor. Replacement capacitors cost $30-60 and can prevent $2,000+ motor failures. Control box relays should also be inspected for pitting and proper operation.

Flow Rate and Recovery Testing: Measure how much water your pump delivers and how quickly your system recovers. Fill a 5-gallon bucket while timing, then calculate GPM. Compare to previous years and your pump's rated capacity. Declining flow suggests pump wear, scaling, or dropping water levels.

Warning Signs to Watch For

Between scheduled maintenance, stay alert for these warning signs that indicate your pump needs immediate attention:

• Short Cycling: If your pump turns on and off more than 6 times per hour during normal use, you have a problem. This is usually a waterlogged pressure tank but can indicate other issues. Short cycling dramatically reduces pump life.
• Pressure Fluctuations: Pressure that bounces up and down during use, or never reaches cut-out pressure, suggests pump problems, tank issues, or a leak somewhere in the system.
• Air in Lines: Spurting or spitting at faucets indicates air entering the system—possibly from low water levels, a failing pump, or cracks in the drop pipe.
• Higher Electricity Usage: A pump working harder than normal draws more power. Check your well system if electricity bills spike without explanation.
• Sand or Sediment: New sediment in your water often indicates a failing pump, damaged screen, or well casing problems that need professional evaluation.