Well Pump Clicks But Won't Start - Troubleshooting Guide
Experiencing this problem right now? Call us for immediate assistance.
You turn on a faucet, hear the familiar click from the pressure switch, but the pump doesn't start. That clicking confirms the switch is trying to activate the pump—so why isn't anything happening? This symptom points to specific failure points in the starting circuit.
Common Causes
- Failed Start Capacitor: The capacitor provides the electrical boost needed to start the motor. When it fails, the motor can't overcome inertia to begin spinning.
- Seized Motor: Sand, rust, or worn bearings can lock up the motor. It tries to start but can't turn.
- Low Voltage: If voltage is too low, the motor doesn't have enough power to start. It may hum or click without running.
- Bad Control Box: For submersible pumps, the control box contains the starting components. Any internal failure prevents starting.
- Thermal Overload Tripped: If the motor overheated previously, the thermal protection may be keeping it off until it cools.
- Loose Connections: Corroded or loose wire connections in the control box or pressure switch create resistance that prevents starting.
Warning Signs to Watch For
- Audible click from pressure switch
- No motor sound or hum after click
- Click repeats if you cycle faucet
- Breaker stays on but pump doesn't run
- May hear slight buzz from control box
How to Fix This Problem
1. Check Voltage at Control Box
Measure voltage with the pump trying to start. If it drops significantly (more than 10%), you have a power problem upstream.
2. Test the Capacitor
Capacitors can be tested with a multimeter. A bulged or leaking capacitor is obviously bad and should be replaced.
3. Try Spinning Manually
For accessible jet pump motors, you may be able to manually spin the shaft to check for seizure. Never reach into an energized motor.
4. Check for Thermal Lockout
Some control boxes have a reset button. If the motor overheated, it may need time to cool before resetting.
5. Inspect Connections
With power off, check all wire connections for corrosion, looseness, or burned spots.
When to Call a Professional
While some minor issues can be addressed by homeowners, well system problems often require professional diagnosis. Call Southern California Well Service if:
- You're not comfortable working with electrical systems
- The problem persists after basic troubleshooting
- You notice multiple symptoms at once
- Your well is over 10 years old and hasn't been serviced
We offer same-day emergency service throughout San Diego, Riverside, and San Bernardino counties.
We service all major pump brands including Franklin Electric, Grundfos, Goulds (Xylem), and Sta-Rite (Pentair). Our trucks carry common parts and components for same-day repairs.
Frequently Asked Questions
Why does my pump click but not start?
The clicking pressure switch is trying to send power, but something prevents the motor from running. Most commonly this is a failed capacitor or seized motor.
Can I replace a well pump capacitor myself?
If you're comfortable with electrical work and safety precautions, yes. Capacitors are available at electrical suppliers. Always discharge the old capacitor before handling.
How do I know if my well pump motor is seized?
A seized motor often makes a humming sound when power is applied but can't turn. In some cases there's no sound at all if thermal protection engages immediately.
How much does a well pump capacitor cost?
Capacitors themselves cost $15-50. Having one professionally replaced typically runs $100-200 including the service call.
Need Help Now?
Southern California Well Service provides expert well pump repair and diagnostics. We've been solving well problems across Southern California since 2006.
Call (760) 440-8520 for ServiceRelated Articles
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