Liberty Pump Pro 380 Not Working

Why Is My Liberty Pump Pro 380 Not Working?

This guide on Liberty Pump Pro 380 Not Working will reveal 7 common culprits that throw a wrench into work and prevent the system from functioning at all. Turns out, you will learn about the steps you need to take to bring the pump into working condition. 

Liberty Pump Pro 380 Not Working [7 Easy Solutions]

Liberty Pump Pro 380 is not working because of one of the following reasons, including:

  • Electrical issues
  • Switch gets stuck in the Off position
  • Insufficient liquid level
  • Defective Switch
  • Restricted discharge line
  • Clogged Impeller
  • Improper check valve installation 

Below, I will explain each of the culprits and take you through the troubleshooting steps to bring the pump back into working status. 

Here we go.

1. Electrical Issues

This sewage pump from Liberty Pumps requires 115V of electricity to power up the unit. If it receives less amount of voltage than that, the unit will never kick on to move liquid. 

Turns out, loose wiring, blown out fuse, and tripped circuit breaker are other culprits that prevent the Pump Pro 380 from working properly. 

How To Fix: 

First off, ensure you plug the unit into a properly grounded outlet that provides enough juice to activate the unit. 

The best bait is to call a qualified electrician to check all wiring for proper connections, adequate voltage, and capacity. Don’t forget to check the fuses or replace the fuse if it goes plugged. 

Lastly, check the circuit breaker for the pump and verify it doesn’t get tripped. 

2. Switch Gets Stuck In The Off Position

The float switch for pump activation is prone to malfunction because of its default design and position. It works as the liquid rises. Over time, it gets corroded or restricted by waste. As a result, the switch gets stuck in the Off position and hinders the normal operation of the pump. 

How To Fix: 

Fortunately, the QuickTree technology of this pump makes float switch inspection easy. Because of this design, you can easily remove the float switch without disassembling the entire pump. 

Just remove the QuickTree assembly from its holder and inspect the float switch for corrosion and other restrictions. Once you clean the switch thoroughly, reassemble the QuickTree into its holder and secure it. 

3. Insufficient Liquid Level

The float switch kicks on once the level of liquid rises up in a certain height. If the liquid level doesn’t rise up to the activation mark of the float switch, the unit will never come on. 

How To Fix: 

Check the basin and ensure there is enough liquid. In short, verify that the liquid level is allowed to rise enough to activate the switches. 

4. Defective Switch

If the switch (that activates the pump with rise of the liquid) goes bad, your Liberty Pump Pro 380 won’t work anymore. 

Luckily, you can easily determine whether the float switch is at fault or not by bypassing it. Unplug the pump from the piggyback float switch and plug the pump cord directly into a wall outlet. 

Once you connect the power cord into a wall outlet, the pump should come on. If not, I bet the switch is the culprit and you need to replace it. 

How To Fix: 

As mentioned earlier, the QuickTree technology makes float switch inspection & replacement simple because you don’t need to remove the entire pump. 

What you need to do is- locate the QuickTree Assembly which you can find under the separate access cover. Unbolt the access cover and take out the QuickTree assembly from its holder. 

Once you replace the float switch, reinsert the QuickTree assembly into its holder and seal the power cord, float switch cord, and optional alarm cord in the sealing rubber channel. Finally, re-secure the access cover by tightening it up. 

5. Discharge Line Gets Clogged

Your Liberty Pumps Pro 380 won’t work or pump any liquid at all if foreign materials like debris or ice make a nest in the discharge line. 

How To Fix: 

Inspect the discharge line for foreign materials and flush the pipe if necessary to release the stuff to let the liquid pass through it freely. 

6. Pump Impeller Gets Clogged

A pump impeller is the component that transfers energy from the motor to let the pump move liquid. If the impeller gets clogged by dirt or other foreign materials, the pump will fail to pump out waste water. 

How To Fix: 

Inspect the impeller first for blockage. To do so, take the pump out of the basin and remove the cutter and cutter plate. Now, take a look at the area around the impeller and clean the area. Once you clean the impeller area, reassemble everything to complete the installation. 

7. Improper Installation of The Check Valve

A check valve prevents the backflow of liquid. If you install the check valve improperly, it can’t stop the backflow of water. As a result, the proper operation of the pump gets interrupted. 

How To Fix: 

Check the check valve for proper installation & operation. Regarding this, remove the check valve which you can find after the union. If needed, reinstall the valve correctly and verify it’s working like a charm. 


Why is my sewage treatment plant pump not working?

Your sewage treatment plant pump won’t work due to a clogged impeller, faulty switch, electrical issues, or the pump itself goes bad. If you want the pump to work properly, you must address these issues and resolve them. On the other hand, if the age of the pump is more than 5 years, it will be best to replace the pump with a new one. 

What happens if a sewage pump stops working?

If your sewage pump stops working at all, the waste will overflow and flood at the same time. For the same reason, it may even burn out the motor. 

How do I know if my sewage pump is bad?

Here are some signs that let you know about a malfunctioning sewage pump: 

  • Dirty water will run through your system or you may need to deal with filthy water.
  • Your sewage pump will struggle to activate
  • The pump will keep cycling 
  • You will hear a strange noise from the system


Finally, we reach the end of the article. Throughout this guide on Liberty Pump Pro 380 Not Working, I depicted all the culprits that prevent the pump from functioning or moving waste liquid. To resolve this issue, follow the troubleshooting steps I mentioned. Good Luck! 

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  1. Thanks Eric.
    I think my impeller is clogged.
    I’m also an HVAC guy.
    I’ll keep you posted.

    Happy 4th.


    1. Hey Robb,

      This is why I created this blog to help folk like you and me. Thanks for your positive feedback.

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