How to Fix "Bonnet Removed" Error

Why does this happen?

The "Bonnet Removed" error means the robot cannot detect the bonnet (the top cover). This usually happens because:

• The bonnet is not seated correctly.
• The metal sensor tabs on the bonnet or base are dirty.
• The tabs are bent and not making contact.
• The night light connection is lost (on LR3, power flows through the bonnet for the night light).

Step 1: Check Seat & Tabs

The simplest fix is often just reseating the bonnet.

1. Remove the bonnet: Press the release buttons on both sides and lift it off.
2. Inspect the tabs: on the left-rear side of the base and the corresponding tabs on the bonnet.
3. Clean the tabs: Wipe them with a clean, dry cloth or use a little rubbing alcohol to remove dust/corrosion.
4. Reseat the bonnet: Place it back on, inserting the rear tab into the slot first, then snapping the side tabs down.
5. Listen for the click: Ensure both side tabs snap audibly into place.

Step 2: Adjust Metal Contacts (LR3)

On the Litter-Robot 3, the metal tabs on the bonnet can get pushed flat over time, losing contact with the base.

1. Remove the bonnet.
2. Locate the two curved metal tabs on the left side of the bonnet (inside).
3. Gently bend them outward slightly to ensure they press firmly against the base contacts when installed.
4. Reinstall the bonnet and check if the yellow light stops flashing.

Step 3: Vacuum Sensors (LR4)

Litter-Robot 4 uses sensors in the bezel to detect the bonnet.

1. Remove the bonnet.
2. Vacuum the sensor holes on the top rim of the base (where the bonnet sits).
3. Wipe the top rim of the base with a microfiber cloth.
4. Reinstall the bonnet.

Step 4: Hard Reset

If cleaning and reseating doesn't work, perform a hard reset to clear the logic board memory.

1. Unplug the power supply from the wall while the unit is powered ON.
2. Wait 60 seconds.
3. Plug it back in.
4. Allow it to complete the startup cycle.