Stop first: Keep cats away while testing. Unplug the unit before removing the globe or touching an exposed moving area. Stop immediately if the unit is hot, smells burnt, has a damaged cord, or makes grinding or straining sounds.
A missed automatic cycle does not always mean the motor has failed. First separate three situations: the unit never detected the cat, it detected the visit but is waiting or paused, or it tries to cycle and stops with an error. This guide is for a unit that remains in the home position; a globe that starts and jams needs a different diagnostic path.
Before taking it apart
Three quick checks
- Wait out the selected cycle delay after the cat exits; the unit should not rotate while a cat is present.
- Check the control-panel or app status for sleep mode, a full drawer, a paused state, or an active error before resetting anything.
- Make sure the cat is heavy enough for the current manufacturer rules and that the unit is on a firm, level surface.
Fixes in order
Test after each step. Stop as soon as automatic cycling returns; changing several things at once makes the cause harder to identify.
- 1
Confirm it is a missed cycle, not a normal delay
Note the time the cat exits and wait through the configured cycle delay. Check whether sleep mode or another schedule is suppressing automatic cleaning. Do not trigger a cycle while a cat is near the opening.
Why this matters: The unit intentionally waits after a visit, and scheduled modes can make correct behavior look like a fault.
What success looks like: The status changes from cat detected or timing to ready, then the unit completes one normal cycle.
- 2
Read the current status before pressing buttons
Record the light-bar color or pattern and the exact status or notification shown in the Whisker app. Take a screenshot if an error is present.
Why this matters: A sensor, drawer, bonnet, or motion error needs its own path. Resetting first can erase the most useful clue.
What success looks like: You can describe whether the unit is ready, paused, timing, full, offline, or showing a named fault.
- 3
Check placement and physical stability
Verify that all feet sit securely on a firm, level surface and that the unit is not rocking, pressed tightly against a wall, or resting unevenly on thick carpet. Follow Whisker’s current placement guidance for any mat or carpet tray.
Why this matters: The weight-sensing system depends on stable contact with the floor. Soft or uneven support can make cat detection inconsistent.
What success looks like: The base does not rock when lightly checked and has the clearances required by the current manual.
- 4
Restore the correct litter level
With the globe in the home position, keep compatible litter at or below the raised fill line and distribute it evenly. Remove excess litter rather than compressing it. Clear loose litter or objects that prevent the globe, waste drawer, or bonnet from seating correctly.
Why this matters: Overfilling adds load and can interfere with sensing or movement; incorrect litter can also sift poorly.
What success looks like: The litter bed is even, below the fill line, and no loose material obstructs assembly.
- 5
Empty and correctly reseat the waste drawer
Pull out the drawer, empty it if needed, fit the liner so it does not block sensors or protrude into the base, and slide the drawer fully home. Clean sensor windows only by the method in the current manufacturer instructions; do not spray cleaner into the base.
Why this matters: A full reading or poorly seated liner can hold the unit in a non-ready state even when the drawer does not look packed.
What success looks like: The drawer sits flush and the full indication clears after the documented reset or recalibration.
- 6
Perform the documented reset at home position
Return the globe to the home position and use the physical Reset control as described in the current Litter-Robot 4 manual to zero the weight scale. Use the Cycle control for one supervised test. Do not repeatedly reset while weight is on the step or inside the globe.
Why this matters: Moving the unit, adding litter, or emptying the drawer changes its baseline. The physical reset re-establishes that baseline; an app refresh alone may not.
What success looks like: The panel returns to ready and one manual test cycle completes without an error.
- 7
Power-cycle once, then run a controlled detection test
If the panel is still unresponsive, turn the unit off and unplug it for about one minute. Reconnect it directly to a known working outlet, allow initialization to finish, reset the scale at home position, and test once while keeping pets away.
Why this matters: A single clean restart can clear a temporary control state. Repeated restarts without reading the status can hide a persistent fault.
What success looks like: Initialization completes, the unit reaches ready, and it recognizes a later supervised visit after the selected delay.
- 8
Update software only after basic operation is stable
If manual cycling works but automatic behavior or app status remains inconsistent, confirm the app and firmware are current using Whisker’s instructions. Do not interrupt power during a firmware update.
Why this matters: Connectivity and firmware can affect schedules and reporting, but they should be checked after placement, baseline, and mechanical readiness.
What success looks like: The app matches the control-panel state and automatic cycling resumes on the next supervised visit.
What the result means
| What you observe | Likely direction | Next move |
|---|---|---|
| Manual Cycle works, but no visit appears in history | Cat detection, weight threshold, baseline, or unstable placement | Recheck floor contact, cat eligibility, litter level, and the physical reset procedure. |
| Visit is recorded and the unit says timing or sleeping | Configured delay or schedule rather than a motor fault | Review cycle delay and sleep-mode settings; observe one complete window. |
| Drawer-full state remains after emptying | Liner position, sensor cleanliness, or drawer-full calibration | Reseat the liner and drawer, then follow the current DFI reset or calibration instructions. |
| Cycle starts but stops or reverses | This is a motion, pinch, bonnet, overload, or obstruction path | Stop this guide and follow the exact displayed error; do not force the globe. |
| No lights or response after a known-good outlet test | Power supply, cable, connector, or base fault | Stop testing and contact Whisker support, especially while under warranty. |
When to contact support
Contact Whisker if a named error returns after its documented procedure, the unit cannot complete a manual cycle, cat detection remains unreliable on a correct hard-floor setup, or there is any sign of electrical or mechanical damage. Avoid opening the base or bypassing a safety sensor.
- Serial number, purchase date, and warranty status.
- A photo showing the full installation surface and clearance around the base.
- The exact light pattern, app message, and time of the missed visit.
- Cat weight, litter brand or type, and approximate fill level.
- Which steps above were tried and whether a manual cycle completed.
- A short video of the status or sound only if it can be recorded safely with pets kept away.
FAQ
Common questions
Why does my Litter-Robot 4 wait before cycling?
A configurable delay lets clumps form and prevents cleaning immediately after a cat exits. Check the selected delay and wait through it before treating the behavior as a fault.
Can carpet stop automatic cycling?
A soft or uneven surface can affect the weight-sensing baseline. Follow Whisker’s current placement requirements and use only the approved support or carpet-tray arrangement for your setup.
Should I reset from the app or the control panel?
For a weight-baseline issue after moving the unit, changing litter, or emptying the drawer, follow the current manual’s physical Reset-button procedure at the home position. App controls and status refreshes are not necessarily the same operation.
Why does manual cycling work but automatic cycling does not?
That pattern points away from a basic motor failure and toward visit detection, scale baseline, cat eligibility, placement, or a schedule. Check whether the visit is recorded, then verify the floor, litter level, and reset procedure.
Can I keep using it in manual mode?
Only if the unit completes cycles normally, shows no safety or motion fault, and you can supervise it according to the manual. Keep a conventional box available and contact support if automatic detection remains unreliable.
When should I stop troubleshooting?
Stop if there is heat, burning odor, cable damage, grinding, exposed movement, liquid in the base, repeated motion faults, or a cycle that cannot be safely interrupted. Unplug the unit and contact the manufacturer.
Sources and scope
This sequence distinguishes a unit that stays at home from one that begins rotating and stops. Light codes, controls, and firmware behavior may change; use the live Whisker support article for the exact status shown on your unit.
Need to correct this guide?
Send a source or a safer sequence and we will review it.