Rake is stuck or does not return
Stop and check The rake stops partway across the tray or fails to return to its parked position.
Likely causes
- A large clump or a foreign object is blocking the rake path.
- Crystal litter has been pushed into a ridge that the rake cannot climb.
- The tray is not seated square in the bay.
Fix it, in this order
- Unplug and clear the path. Remove the obstruction by hand. Never force the rake while powered.
- Level the crystals. Rake the crystal bed flat by hand every week or two — this prevents most jams.
- Reseat the tray. The tray must sit flat and square, with no lip catching the rake.
When to stop and get help: A rake that stalls on an empty, clean tray has a drive fault and is a warranty item.
Tray sensor error
Common The unit reports no tray fitted, or reports the tray as spent immediately.
Likely causes
- The tray is a third-party refill without the expected sensor profile.
- The tray contacts are dusty.
- The tray counter was not reset after the last change.
Fix it, in this order
- Reset the counter. Use the reset in the app or on the unit after fitting a new tray.
- Wipe the contacts. Clean the tray bay contacts with a dry cloth.
- Use genuine trays. Third-party crystal trays are the most common cause of persistent sensor errors on ScoopFree units.
When to stop and get help: Persistent errors with a genuine tray and clean contacts are a warranty item.
Shows offline in the app
Common The unit works but the PetSafe app shows it as offline, or commands from the app do nothing.
Likely causes
- The box is on a 5 GHz network segment. Almost every litter box on the market is 2.4 GHz only.
- The router moved the unit to a different band after a firmware update or a mesh node reshuffle.
- The box sits behind an appliance or in a metal-lined cabinet that kills the signal.
Fix it, in this order
- Check the band. Confirm your phone is on the 2.4 GHz network when you pair. On a combined-band router, temporarily split the bands or use the guest 2.4 GHz network.
- Power cycle in order. Unplug the box for 30 seconds, then reboot the router, then plug the box back in. Order matters — the box looks for the network on boot.
- Move it 3 feet. Signal strength at floor level behind a washing machine is far worse than it looks. Try the unit in the open before concluding the radio is faulty.
- Re-pair from scratch. Remove the device from the app entirely, then run setup again rather than retrying the existing entry.
When to stop and get help: If it pairs and drops within minutes repeatedly, that is a hardware or firmware fault — contact PetSafe rather than continuing to re-pair.
It still smells
Common The box cycles normally but the room smells worse than expected — often starting a few weeks in.
Likely causes
- The carbon filter is past its life. Filters degrade quietly; there is no warning.
- The drawer gasket has litter dust on the seal face, so the drawer no longer closes airtight.
- Litter depth is too shallow, so urine reaches the drum wall instead of clumping.
- The unit needs a full wash. Waste film builds on the drum wall and no amount of cycling removes it.
Fix it, in this order
- Replace the filter. Set a recurring reminder rather than waiting to notice. PetSafe filters are a running cost, not an optional accessory.
- Clean the gasket. Wipe the drawer seal and the mating face with a damp cloth, then dry. A gritty seal leaks.
- Deepen the litter. Run to the fill line, not below it. Shallow litter is the most common cause of odor in an otherwise healthy unit.
- Full wash every 4-6 weeks. Strip the unit, wash the drum and drawer with unscented soap and warm water, dry completely before reassembly.
When to stop and get help: Persistent ammonia smell despite all of the above can indicate a cat health issue. It is worth a vet conversation, not just a cleaning routine.