LitterHopper error with alternating blue and purple light bar

If the Litter-Robot 4 light bar is alternating blue and purple, this indicates an error with the LitterHopper motor. You will also receive a notification on your phone if you use the Whisker app. LitterHopper errors, from most common error associated to least common, include:

• Motor Fault Disconnected- A Motor Fault Disconnected notification indicates that the LitterHopper is not properly seated. Please follow the steps below to troubleshoot the error.

• Motor Fault /OT Amps (Motor Jammed)-A Motor indicates a motor over-torque, likely due to an object jammed in the dispensing area. Please follow the steps below to troubleshoot the error. 

• Motor Fault Short-This notification indicates there is likely an issue with the LitterHopper motor.
  

Follow these below instructions

Disable the LitterHopper

1. Short press the Reset button on the Litter-Robot 4 control panel. The unit should flash WHITE and then display a solid blue light bar.
   

2. Disable the LitterHopper by long-pressing the Cycle and Connect buttons on the control panel for 3 seconds or tapping the "Disable" toggle button in the app.
   

3. Press and hold the Reset and Connect buttons for 3 seconds, then power the unit on.
   OR
   Unplug the unit for 60 seconds, plug it back in, and power it on.
   

Check LitterHopper installation

1. Remove the LitterHopper. Please note: If the LitterHopper is filled with litter, there may be slight litter leakage from the bottom. To prevent mess, we recommend placing a small container underneath the LitterHopper when removing it.
   

2. Check all of the following areas on the unit:

   1. Ensure there is no gap between the bonnet and the base.
      

   2. Ensure the bonnet hinge sits inside the base hinge pocket completely.
      

   3. Check and remove any dust, loose litter, or clumps from the circular pockets and the power jack. Vacuum cleaning is recommended.
      

Regularly inspect and vacuum clean the dispensing area to avoid recurrence of errors.

Check for obstructions

1. To remove the LitterHopper, lift the LitterHopper up and away from your Litter-Robot 4. Please note: If the LitterHopper is filled with litter, there may be slight litter leakage from the bottom. To prevent mess, we recommend placing a small container underneath the LitterHopper when removing it.
   

2. Empty the litter from the LitterHopper, then check and remove any obstructions or foreign objects from the following areas to inspect and clear the jam:

   • The LitterHopper motor area near the flexible flaps

   • Please note: If a foreign object is stuck in the flap area, use a tweezer or small pliers to remove it. Be careful not to damage or scratch the flaps.
     

   • The dispensing area inside the key
     

Reinstall the LitterHopper

1. Refer to the installation guide to reinstall the LitterHopper.

   1. Ensure there is no gap between the bottom of the LitterHopper and the Litter-Robot 4 Base.
      

   2. Verify the hook tab engages the slot in the bonnet.
      

2. Plug the unit in and power it on.
   

3. Litter-Robot will then perform a clean cycle and return to the Home position with the blue light on.
   

4. Re-enable the LitterHopper by long-pressing the Cycle and Connect buttons on the control panel for 3 seconds or tapping the “Enable” toggle button in the app. 

5. Ensure there is litter inside of the LitterHopper, then run a manual litter dispense test by long-pressing the Power and Cycle buttons simultaneously for 3 seconds.
   

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

Unsuccessful: If the motor does not rotate, you are still seeing a blue and purple alternating light bar, or the app displays the same error message, there's likely an issue with your LitterHopper. Please contact Customer Experience for assistance. 

Issue not resolved?

Please contact our Customer Experience Team for further assistance.

Need Technical Support?

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

Troubleshooting Wizard

You will likely need a new LitterHopper.

1. Disable the LitterHopper by long-pressing the Cycle and Connect buttons on the control panel for 3 seconds or by tapping the “Disable” toggle button in the app.

2. Remove the LitterHopper by lifting it up and away from your Litter-Robot 4.

After receiving the replacement LitterHopper, follow the installation instructions carefully. Test the device to ensure proper functionality and contact Customer Experience if you encounter any issues.

What do I do?

My LitterHopper is under warranty

The LitterHopper automatically includes a 1-year warranty, regardless of if your Litter-Robot 4 is still under warranty. If you purchased your Litter-Robot 4 and LitterHopper together and bought the WhiskerCare Extended Warranty, the LitterHopper will be covered under your WhiskerCare Extended Warranty. Please contact our Customer Experience Team for further assistance.

The warranty on my LitterHopper has expired

If your LitterHopper is no longer under warranty, you will need a replacement LitterHopper.

Parts Needed (choose one):

• Litter-Robot 4 LitterHopper | Installation Instructions