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

Created by Ken MacCormick, Modified on Sun, 31 Dec 2023 at 02:00 PM by Ken MacCormick


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 the manufacturers warranty or Cat Evolution extended warranty
If your Litter-Robot is covered by the manufacturers warranty or Cat Evolution's extended warranty please contact Cat Evolution Customer Support

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: 

Was this article helpful?

That’s Great!

Thank you for your feedback

Sorry! We couldn't be helpful

Thank you for your feedback

Let us know how can we improve this article!

Select atleast one of the reasons

Feedback sent

We appreciate your effort and will try to fix the article