Getting started with Litter-Robot 4

Your Litter-Robot 4 ships fully assembled. Follow these steps to get started or refer to the user manual for more information.

What's in the box

Litter-Robot 4

Litter-Robot 4

Power Supply

1 Carbon Filter

3 Waste Drawer Liners


Most Accessories (optional – sold separately or in bundle)

Ensure proper placement

Your Litter-Robot comes fully assembled and ready to use. Get started by following the steps below.

  1. If possible, place Litter-Robot in the same location as the old litter box (at least during transition).
  2. Make sure the unit is on a firm, level surface in a cool, dry location.
  3. If the unit is placed on carpet or uneven flooring, you will need to use our Carpet Tray accessory to improve the accuracy of weight readings.
  4. Locate the unit near a power outlet. Ensure the unit isn’t pushed against a wall or into a corner.
  5. Place litter mats or rugs in front of the unit.

Add litter

Add clumping litter

Litter-Robot’s litter sifting system requires clumping litter. Note: Translucent or white-coloured litter (most often seen in crystal litter) may impact the litter level and Drawer Full Indicator (DFI) accuracy.

What not to use

DO NOT use litters that are strictly absorbent, non-clumping, loose-clumping, newspaper-based, or wood-based pellets.

Don’t overfill

Fill the globe through the opening until the litter is slightly below the raised fill line when spread flat (about 3.6-4.5 kg by weight). Be careful not to overfill the globe.

Power on and initial clean cycle

Plug it in

Plug the small end of the power supply into the socket on the back of the base. Then plug the AC/DC adapter into a wall outlet.

Initial clean cycle

Press the Power button on the control panel. Litter-Robot will perform an initial clean cycle that will last 2 minutes. (Note: During the initial clean cycle, the cat sensor weight scale is disabled to ensure proper calibration.)


Download the Whisker app

Download the Whisker app and follow the onboarding instructions.

Screens may vary as app gets updated.

Empty the waste drawer when indicated

Empty the waste drawer when indicated by the app or the flashing blue light on the control panel. How often you empty the waste drawer depends on the number and size of your cats. For two average-sized cats, twice per week is typical. For a single cat, once per week is usually sufficient.

To empty the waste drawer, simply pull out the waste drawer, gather the edges of the liner bag, and dispose. To install a new liner or trash bag, wrap the opening over the perimeter of the waste drawer. Push the remainder of the bag into the bottom of the waste drawer.

Add litter as needed

How often you add litter depends on how many cats use Litter-Robot and how frequently they use it. Litter-Robot uses litter very efficiently since the patented sifting mechanism only removes the clumps. We recommend checking the litter level each time you empty the waste drawer. If the litter is below the raised MAX fill line inside the globe, add just enough litter to meet the line.

Control panel buttons


  • Press and release the Power button to turn the robot ON or OFF.
  • The robot will begin a clean cycle when power is turned on.


  • Press and release the Reset button to zero the weight scale. (Do this after emptying the waste drawer, adding litter, etc.)
  • Press and hold, while at the home position, to enter night light setting mode.


  • Press and release the Connect button to turn the WiFi ON or OFF.
  • Press and hold, while at the home position, to initiate the onboarding process.


  • Press and release the Cycle button to start a clean cycle.
  • Press and hold, while at the home position, to enter sleep mode.


  • Press and release the Empty button to start an empty cycle (empties all litter into the waste drawer).
  • Press and hold, while at the home position, to enter cycle delay setting mode.

Indicator lights

Solid blue

Robot ready and connected.

Litter-Robot solid blue light

Flashing blue

Waste drawer full.

Litter-Robot flashing blue light

Solid blue

WiFi flashing yellow

Robot in WiFi onboarding mode.

Litter-Robot solid blue light with flashing yellow

Solid yellow

Robot paused during cycle.

Litter-Robot solid yellow light

Round robin yellow*

Robot cycling.
*Yellow light moving with the rotation of the globe.

Litter-Robot round robin yellow light

Solid red

Cat detected and cycle delay countdown initiated.

Litter-Robot solid red light

Solid purple

Sleep mode enabled, within specified sleep time.

Litter-Robot solid purple light

Installing accessories

Person installing Litter-Robot 4 OdorTrap Packs without holder

Litter-Robot 4 OdorTrap® Packs (no Holder)

Download our Litter-Robot 4 OdorTrap® Pack Installation Guide.

Person installing Litter-Robot 4 OdorTrap Holder

Litter-Robot 4 OdorTrap® Holder

Download our Litter-Robot 4 OdorTrap® Holder Installation Guide.

person installing Litter-Robot 4 Carbon Filter

Litter-Robot 4 Carbon Filter

Download our Litter-Robot 4 Carbon Filter Installation Guide.

Litter-Robot 4 with Ramp

Litter-Robot 4 Ramp

Download our Litter-Robot 4 Ramp Installation Guide.

Litter-Robot 4 sitting on Carpet Tray

Litter-Robot 4 Carpet Tray

Download our Litter-Robot 4 Carpet Tray Installation Guide.

woman installing Litter-Robot 4 waste drawer liner

Litter-Robot 4 Waste Drawer Liner

Download our Litter-Robot 4 Waste Drawer Liner Installation Guide.

person installing Litter-Robot 4 fence

Litter-Robot 4 Fence

Download our Litter-Robot 4 Fence Installation Guide.

Enjoy a life of no scooping

Need help getting started? Contact Whisker Support.

Get support