Litter-Robot 4: White with partial yellow flashing (Low system voltage)

  1. Make sure your unit is plugged in.
  2. Make sure your unit is connected and online.
  3. Make sure your firmware is up-to-date. If the app does not give you the option to update, you have the latest version.


Litter-Robot will detect if the wrong power supply is being used to power the unit or if the power supply is not providing the correct output voltage.

If your unit displays a white light bar with partial yellow flashing, it's indicating that you need to check your power supply.

 You will also receive a notification on your phone if you use the Whisker app.


First, check to ensure that the wall outlet is functioning properly

  1. Try plugging a working lamp into the same outlet.
  2. If the outlet is working, you'll need to check Litter-Robot's power supply.
  3. Ensure the power supply is properly plugged into Litter-Robot.
  4. Now turn on your unit.

Litter-Robot will then perform a Clean cycle and return to the Home position with a blue light bar.

Successful: If your unit displays a blue light bar, you've been successful. 

Unsuccessful: If you are still seeing a white light bar with partial yellow flashing there's likely an issue with your Litter-Robot.

Issue not resolved?

To repair your Litter-Robot, you will need a power supply.

What do I do?

My unit is covered by WhiskerCare™
If your Litter-Robot is covered by our WhiskerCare™ warranty, you have access to replacement parts, at no cost, to get your Litter-Robot up-and-running quickly.  

  1. Simply log in to your account at
  2. Click on ‘My Robots’ to access the parts available for your robot. 
  3. Select the part you need
  4. We’ll ship you the part at no cost, along with detailed instructions.


The warranty on my unit has expired
If your unit is no longer under warranty, we can help you with the necessary parts and instructions to properly fix your unit at home. 

Parts Needed: 

Need technical support?

Our Troubleshooting Wizard will solve most issues and is the fastest way to get help. 

Troubleshooting Wizard

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