Little Giant Pump Impeller Not Spinning

Why Is My Little Giant Pump Impeller Not Spinning?

Little Giant Pump impeller is not spinning due to power supply issue, a clogged impeller, or defective motor. 

If you want the pump to rotate the impeller to move water out of the sump pit, you must address the issue and resolve that. 

And this guide will help you determine the culprit behind a non-spinning impeller. So, keep reading till the end. 

Little Giant Pump Impeller Not Spinning [4 Easy Solutions]

Little Giant pump’s impeller won’t spin due to inconsistent power supply, a faulty capacitor, or a clogged impeller. Turns out, the impeller will never rotate if it gets seized up or the motor of the pump is at fault. 

Below, I will explain each troubleshooting step to resolve those issues that cause the impeller to not spin. 

1. Power Supply Issue

Your Little Giant Sump Pump won’t come on if it doesn’t receive enough electric power. 

Generally, the unit will receive no power if you wire the unit incorrectly or the circuit breaker gets tripped. 

Turns out, if the fuse of the pump gets blown out, your unit won’t get enough juice to spin the impeller. 

How To Fix: 

To begin with, check the circuit breaker for the pump and ensure it doesn’t get flipped down. Don’t hesitate to flip up the circuit breaker to set it to the On position. 

If the circuit breaker doesn’t get tripped, check the sump pump for a blown out fuse. Replace the fuse (a 15-amp capacity fuse) with a new one if required. 

However, if replacing the fuse doesn’t bring any luck, it’s time to inspect the wiring of your house or the wiring of the sump pump. In this case, I highly recommend you to call a certified electrician to inspect both the wiring of the house and the sump pump. 

2. Impeller Gets Clogged

A clogged impeller is the most common sump pump issue that can throw a wrench into work. Once the impeller gets clogged by debris, this component will never spin. 

Freeing up the blockage from the impeller will be a simple fix to this issue. The ‘How To Section’ below will help you clean the impeller on your Little Giant Sump Pump. 

How To Fix: 

To clean the impeller, follow the below step-by-step instructions: 

  • Disconnect the sump pump from electric connections and detach the unit from the discharge plumbing. 
  • Unscrew the five screws that hold the base to the volute. Then, separate the base from the volute by prying up a screwdriver between them. 
  • Now, clean the impeller with a cleaning solution of vinegar and soup. Never use strong solvents to clean the impeller. 
  • Once you clean the impeller, ensure the impeller turns freely. 
  • Attach the base to the volute and make sure the seal is properly aligned. 
  • Finally, attach the pump to the discharge plumbing and restore power to the unit.  

3. A Faulty Capacitor

Every sump pump including the Little Giant requires a start capacitor to provide an electric push to the motor to start the unit. If the capacitor gets faulty, the motor will not get the electric surge to activate the motor. As a result, the impeller of the unit will also not spin. 

How To Fix: 

The capacitor is located inside the unit. Disassemble the unit and inspect the capacitor for proper operation. If it’s at fault, replace it with a new capacitor. 

Of course, you must take some precautions and re-seal the housing properly. If you aren’t mechanically inclined, call a professional to do this task for you. 

4. Defective Motor

A faulty motor is another culprit that causes the impeller to not spin. Regarding this, you must replace the entire unit to pump water out of the sump pit. 


The impeller on a sump pump is responsible for moving water out of the sump pit. If it gets restricted or stops spinning, the unt will fail to pump water. 

Several reasons including power supply issue, clogged impeller, or defective motor are responsible for the impeller to not spin.  

To bring the unit into working condition, you must address those issues and resolve them. Fortunately, this troubleshooting guide broke down everything you need to know to fix this issue. 

Just follow the troubleshooting instructions I mentioned and have the unit ready to pump water. 

Good Luck!

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