Litter-Robot 3: Pinch contact installation guide

Litter-Robot 3 is equipped with an anti-pinch safety feature. While cycling, if a potential condition is detected, the globe will stop and reverse direction for 2 seconds. The yellow light will begin flashing quickly (about four times per second), awaiting your action. Once the blockage is cleared, press any button to return the globe to the Home position. If the pinch detect terminals become damaged, they may need to be replaced.

Tools Needed:

  • Phillips Screwdriver
  • Flathead Screwdriver
  • Needle Nose Pliers


1. Turn the power off and unplug the unit.

2. Remove the bonnet, globe, and waste drawer.


1. Turn the base over so it is upside down.

2. Remove the 9 screws connecting the bottom of the base to the top of the base.

  • 2 screws in the left handle
  • 2 screws in the right handle
  • 4 screws, one in each corner of the unit
  • 1 screw at the back of the unit behind the black cat sensor foot

3. Gently lift to separate the two halves of the base. The pieces will still be connected by a wire.

4. Set the piece aside with the wire still connected.

Remove Old Pinch Detect Terminals

1. Using needlenose pliers, disconnect the two black wires from the pinch terminals.

2. Note the placement of the pinch contacts.
Using needlenose pliers, gently remove each of the silver pinch contacts. 

Install New Pinch Detect Terminals

1. Using needlenose pliers, position the new pinch contacts. A flathead screwdriver can help to gently push them into place. Make sure the contacts are fully seated in the slot. Both metal pinch contacts should be touching each other.

2. Reconnect the black wires by pushing them into place. The wires are not specific to a terminal. 


1. Replace the removed half of the base back in place. Be sure it's properly seated.

2. Reinstall the 9 screws, turn the base upright.

3. Reinstall the globe, bonnet, and waste drawer.

4. Plug in and power it on.

5. Allow Litter-Robot to run a clean cycle. Press the reset button.

Successful: If your unit returned home and displays a solid blue light, you've been successful.

Unsuccessful: If you're getting three flashing lights, it is most likely due to the position sensor being out of place. Follow the steps in our Litter-Robot 3: All three lights flashing (Globe position fault) guide to inspect the position sensor.

If your unit is still not displaying a solid blue light after returning to home position, or cannot complete the cycle, please contact Whisker Customer Experience.

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