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

  1. Unplug and clear the path. Remove the obstruction by hand. Never force the rake while powered.
  2. Level the crystals. Rake the crystal bed flat by hand every week or two — this prevents most jams.
  3. 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

  1. Reset the counter. Use the reset in the app or on the unit after fitting a new tray.
  2. Wipe the contacts. Clean the tray bay contacts with a dry cloth.
  3. 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

  1. 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.
  2. 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.
  3. 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.
  4. 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

  1. Replace the filter. Set a recurring reminder rather than waiting to notice. PetSafe filters are a running cost, not an optional accessory.
  2. Clean the gasket. Wipe the drawer seal and the mating face with a damp cloth, then dry. A gritty seal leaks.
  3. 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.
  4. 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.