Why Is My Sump Pump Clicking but Not Turning On?
Last updated October 31, 2026
The short answer
Common Causes of Clicking
The clicking sound you hear often comes from the pump's internal switch or a relay trying to engage the motor. When the motor can't turn, the switch cycles rapidly, producing that clicking noise. A stuck float switch is a frequent culprit, especially if the float is caught on debris or the pump's cord.
Another possibility is a failed start capacitor. This small part gives the motor an initial boost to spin. If it's weak or broken, the motor may only hum or click. A clogged impeller, often from sand or small stones, can also prevent the motor from turning, causing the same clicking behavior.
Check the Float Switch First
The float switch tells the pump when to turn on and off. If it's stuck in the up position, the pump may click as it tries to start. Lift the float manually to see if the pump engages. If it does, the switch is likely the problem.
Also, inspect the float's tether for tangles or kinks. In a tight basin, the float can catch on the pump's own cord or the discharge pipe. Adjust the float so it moves freely. If the pump still clicks, move on to the electrical side.
- Unplug the pump before reaching into the basin
- Look for debris wrapped around the float
- Test the float by lifting it gently
- Check the float's tether for kinks
- Make sure the pump sits level on the floor
Inspect Power and the Motor
A clicking pump can also have an electrical issue. Check the outlet and the power cord for damage. Plug another device into the same outlet to confirm power is present. A tripped circuit breaker or a blown fuse can also cause clicking as the pump tries to start.
If the pump hums but won't spin, the motor may be seized. This can happen after a long idle period or if the pump ran dry. Before calling a pro, you can try turning the impeller by hand if accessible, but only with the pump unplugged. A pro can safely disassemble and test the motor.
- Test the outlet with a lamp or phone charger
- Reset the circuit breaker if tripped
- Listen for a hum after the click
- Check the power cord for cuts or frays
- Look for a thermal overload reset button
When to Call the Pros
If the pump still clicks after checking the float and power, it's time to call local water damage pros. They can test the capacitor, check the motor windings, and replace faulty parts. Attempting major repairs on a submerged pump carries electrical risks.
A pro can also inspect the basin for issues like a stuck check valve or a blocked discharge line, which can cause the pump to overwork. In many cases, a simple adjustment or part replacement solves the problem. If the pump is old, replacement might be the practical choice.
Prevent Future Clicking Issues
Regular maintenance can reduce the chances of a clicking pump. Once a year, unplug the pump and clean the basin of silt and debris. Check the float's movement and ensure the pump sits upright. Test the pump by pouring water into the basin to see if it cycles properly.
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Call Now (617) 404-2753Frequently asked questions
Why does my sump pump click but not start?
The click is usually the switch or relay trying to start the motor. If the motor can't turn, the switch cycles rapidly. Check the float switch, power supply, and for a seized impeller. A pro can test the capacitor and motor.
Can a sump pump click and still be broken?
Yes, clicking often indicates a problem. It could be a stuck float, a bad capacitor, or a motor that's seized. If the pump doesn't start after basic checks, have a pro inspect it to avoid a flooded basement.
How do I know if my sump pump needs replacement?
If the pump is old, has recurring issues, or the motor is burned out, replacement may be more cost-effective than repairs. A pro can assess the pump's condition and recommend whether to repair or replace it.