Light Color Quick Reference
Solid Blue
Ready - Unit is powered on and working normally (LR3 & LR4)
Solid White (LR4 only)
WiFi is turned off - appears near the Connect button
Solid Yellow
Attention needed - Check drawer or litter level
Solid Red
Error - Cat detected or critical issue requiring attention
Flashing Blue
Waste drawer is full (LR3 & LR4)
Purple
Sleep mode active - 8-hour quiet period
Flashing Light Patterns
Flashing Yellow Light
Meaning: Bonnet not detected or improperly seated
Fix:
- Remove and reseat the bonnet, listening for two clicks
- Check that all sensor tabs are properly aligned
- Vacuum the bonnet sensor holes
- Inspect for any damage to the bonnet tabs
Flashing Blue Light
Meaning: Waste drawer is full (LR3 & LR4)
Fix:
- Empty the waste drawer
- Replace with a fresh bag
- Reinsert drawer firmly
- Press the Reset button
Solid Red with Flashing Yellow
Meaning: Globe jam or overload detected
Fix:
- Unplug the unit immediately
- Remove the bonnet and globe
- Check for obstructions in the base and waste port
- Verify the motor is not loose or obstructed
- Ensure seal strips are properly seated
- Check that the filter cover is correctly installed
- Reassemble and power on
Solid Red with Flashing White
Meaning: Globe position detection error
Fix:
- Check that litter is not overfilled (below MAX line)
- Remove bonnet and globe to inspect seal strips
- Ensure no foreign objects are in the base
- Verify the motor is secure
- Check that globe glider buttons are installed
- Inspect the globe track for damage
- Reassemble and power cycle
Litter-Robot 3 Position Fault Codes
These sequential flashing patterns indicate position sensor issues on the LR3:
Blue → Yellow → Red (sequential)
Cannot find dump position. Unit will continue in auto mode but requires repair.
Red → Yellow → Blue (sequential)
Cannot find home position. Unit will continue in auto mode but requires repair.
All Three Flashing Together
Cannot find dump or home position. Unit will not cycle automatically. Requires repair.
Motor Obstruction Codes (LR3)
Yellow & Red (sequential)
Motor obstruction detected during clockwise rotation. Check for jammed litter or debris.
Blue & Red (sequential)
Motor obstruction detected during counter-clockwise rotation. Check for jammed litter or debris.
Performing a Hard Reset
When error lights persist, a hard reset often clears the issue:
- Unplug the unit from power
- Wait 30 seconds
- Plug the unit back in
- Allow the startup cycle to complete
- If the error persists, try the specific fixes above
Get instant error alerts
RobotSitter.io monitors your Litter Robot's status and sends you notifications the moment an error occurs, even when you're away from home.