Symptoms
- Cycle doesn't start automatically after the cat leaves
- Rake or globe stops partway through a cycle
- Error light or sound instead of normal operation
- Waste isn't being separated from clean litter
Likely causes
- CommonWaste receptacle fullMost models pause cycling and show an alert once the waste drawer or bag reaches capacity.
- CommonWeight or motion sensor still detecting the cat, or a delay settingMany boxes wait a set number of minutes after the cat leaves before starting a cycle, which can look like it's not working.
- CommonClumped litter or a foreign object jamming the rakeA large clump, litter stuck in the track, or a dropped toy can physically block the rake's movement.
- PossibleLow or dead batteries (battery backup models)Some units run partly on battery backup, which can fail even while plugged in.
- PossibleLitter level too high or too lowLitter outside the recommended fill line can throw off the rake's clearance and jam the mechanism.
What to do
- Empty the waste receptacle and reset any full indicator per the manual.
- Wait the manufacturer's specified delay time after the cat exits before assuming the cycle has failed.
- Check the litter level against the fill line marked inside the unit and adjust up or down as needed.
- Look along the rake's track for clumped litter, hardened waste, or a stuck object, and remove it by hand.
- Run a manual cycle using the unit's start button to see if it completes without the cat present.
- Replace backup batteries if the unit uses them, even if it's plugged into the wall.
- Clean the sensors (often small dark eyes near the top or sides) with a dry cloth, since dust can block their detection.
Tools and parts
- Gloves
- Dry cloth
- Small scoop
Replacement rake or motor assemblySearch: “automatic litter box replacement rake motor”
When to call a pro
If the rake motor strains or stalls consistently even when clear of debris, contact the manufacturer about a replacement motor or rake assembly, often available under warranty.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.