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Fix a robot litter box that will not scoop

We'll confirm the symptom, rule out power and placement, then check the waste drawer, sensors, and motor—or tell you when to call a pro.

Troubleshooting · Home appliances
10–25 min
What you'll need
  • Soft cloth and rubbing alcohol (for sensors)
  • Replacement waste drawer bags (if needed)
Step 1 of 10

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Steps

Goal: Confirm the symptom, rule out power and placement, then check the waste drawer, sensors, and motor.

  • Confirm the unit is plugged in and the control light is on. Trigger a cycle manually (button or app).
  • Good: The globe does not rotate when it should—cycling fault. Proceed to Check power and placement.
  • Bad: The unit cycles normally—no problem.

Check power and placement

Goal: Rule out power loss and poor placement before opening the unit.

  • Verify the unit is plugged in and the circuit breaker has not tripped. Plug a lamp into the same outlet to confirm it works.
  • Check the unit sits on a level, hard floor. Do not place it on carpet, a litter mat, or against a wall—sensors can misread and the globe may not rotate correctly.
  • Good: Power is on and the unit is level on a hard floor. Proceed to Waste drawer and sensors.
  • Bad: Breaker tripped or unit not level—fix those first.

Waste drawer and sensors

Goal: Empty the drawer, reseat the bag, and clean sensors that can stop cycling.

  • Empty the waste drawer. Remove and replace the bag so it lies flat with no creases at the sensor. A wrinkled bag edge can trigger the drawer sensor even when the drawer looks empty.
  • Check litter level—excess litter can overload the weight sensor. Remove litter until it is at or below the maximum fill line per your manual.
  • Unplug the unit. Wipe the sensors (cat sensor, rotation sensor, waste drawer sensor) with a soft cloth dampened with rubbing alcohol. Let dry before powering on.
  • Good: Drawer empty, bag seated, sensors clean. Trigger a cycle and check.
  • Bad: Unit still does not cycle—proceed to Clear blockages.

Clear blockages

Goal: Remove debris from the motor path and globe so the scoop can rotate.

  • Unplug the unit. Remove the globe or bonnet per your model. Check your owner’s manual or search “[brand] [model] service manual” for disassembly steps if unsure.
  • Inspect the motor area and the path the scoop travels for clumped litter, debris, or foreign objects. Clear any blockages.
  • Check that the globe is seated correctly when reassembling. A misaligned bonnet can trigger error lights and prevent cycling.
  • Good: Motor path clear and globe aligned. Reassemble and trigger a cycle.
  • Bad: Motor hums but the globe does not move—call a pro.

When to get help

Call an appliance technician if:

  • The motor hums but the globe does not move after you have cleared blockages and cleaned sensors.
  • You suspect an electrical fault or wiring issue.
  • You are not comfortable opening the unit.

Many robot litter boxes have sealed or limited-repair designs. Replacement may be more practical than repair for older units.

Verification

  • The globe rotates when a cycle is triggered and waste drops into the drawer.
  • No error lights or unusual noises.
  • Sensors are clean and the waste drawer bag is seated correctly.
  • The unit sits level on a hard floor.

Escalation ladder

Work from the device outward. Stop when the problem is fixed.

  1. Confirm symptom Verify the unit does not scoop or cycle when it should; rule out a different problem.
  2. Power and placement Check circuit breaker, outlet, and that the unit sits level on a hard floor.
  3. Waste drawer and sensors Empty the drawer, reseat the bag, and clean the sensors.
  4. Clear blockages Remove debris from the motor path and globe; check alignment.
  5. Call a pro Motor hums but globe does not move after cleaning, or electrical fault suspected.

What to capture if you need help

Before calling support or posting for help, have these ready. It speeds everything up.

  • Whether the motor hums when a cycle is triggered
  • Waste drawer fill level and bag condition
  • Sensor condition (clean or dirty)
  • Steps already tried

Does the unit have power but not scoop or cycle?

Check that the unit is plugged in and the control light is on. Trigger a cycle manually. If the scoop or globe does not rotate, the cycling path has failed.

Confirm the unit is plugged in. Trigger a cycle (button or app). If the globe does not rotate, the cycling path has failed. Good: power on but no cycle—proceed. Bad: no power—check outlet and breaker first.

Yes No

You can change your answer later.

Is power on and the unit level on a hard floor?

Circuit breaker, placement on carpet or mat, and uneven surfaces can prevent cycling.

Verify the outlet works and the circuit breaker has not tripped. Check the unit sits on a level, hard floor—not carpet, a litter mat, or against a wall. Good: power on and placement correct. Bad: breaker tripped or unit not level—fix those first.

Yes No

You can change your answer later.

Is the waste drawer empty and the bag seated correctly?

A full drawer or wrinkled bag edge triggers the drawer sensor and stops cycling.

Empty the waste drawer. Remove and replace the bag so it lies flat with no creases at the sensor. Good: drawer empty and bag seated. Bad: drawer full or bag wrinkled—fix and retest.

Yes No

You can change your answer later.

Empty drawer and reseat bag, then retest

Empty the drawer and reseat the bag. Trigger a cycle. If it cycles, the drawer sensor was the cause. If not, proceed to clean sensors.

Done

Are the sensors clean?

Dust or debris on sensors causes false readings and stops the cycle.

Unplug the unit. Wipe the sensors (cat, rotation, waste drawer) with a soft cloth dampened with rubbing alcohol. Let dry. Good: sensors clean. Bad: sensors dirty—clean and retest.

Yes No

You can change your answer later.

Clean sensors and retest

Clean the sensors with rubbing alcohol. Reassemble and trigger a cycle. If it cycles, dirty sensors were the cause. If not, proceed to clear blockages.

Done

Is the motor path and globe clear of debris?

Clumped litter or debris can block the motor or globe from rotating.

Unplug the unit. Remove the globe or bonnet. Inspect the motor area and scoop path for blockages. Clear debris. Check globe alignment when reassembling. Good: path clear and globe aligned. Bad: motor hums but globe does not move—call a pro.

Yes No

You can change your answer later.

Clear blockages and retest

Clear debris from the motor path and globe. Reassemble and trigger a cycle. If it cycles, the blockage was the cause. If the motor hums but the globe still does not move, call a pro.

Done

Does the unit cycle after cleaning?

Trigger a cycle. If the globe rotates and waste drops into the drawer, the issue is resolved. If the motor hums but the globe does not move, call a pro.

Done

Call a pro

Call an appliance technician if the motor hums but the globe does not move after clearing blockages and cleaning sensors, if you suspect an electrical fault, or if you are not comfortable opening the unit.

Done

Reviewed by Blackbox Atlas

Frequently asked questions

Why would a robot litter box stop scooping?
Common causes: full waste drawer or wrinkled bag edge triggering the drawer sensor, excess litter weight, unit not level, dirty sensors, debris blocking the motor or globe, or mechanical wear. Check power and placement first, then empty the drawer and clean sensors.
Can I fix a robot litter box that will not scoop myself?
Yes, for most causes. You can empty the waste drawer, reseat the bag, clean sensors, clear debris from the motor path, and check placement. Replacing the motor or internal parts may require a pro depending on the model.
When should I call a technician for a robot litter box that will not scoop?
Call a pro if the motor hums but the globe does not move after you have cleared blockages and cleaned sensors, if you suspect an electrical fault, or if you are not comfortable opening the unit. Many units are designed for limited user repair.

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