Litter-Robot 5 extended scale activity: the fix
- Check if your cat is sleeping in the Globe — — the single most common cause.
- Confirm the unit is level — and all four feet move freely, clear of litter or debris.
- Zero the SmartScale — with Cancel if you recently added litter or emptied the drawer.
- Update firmware — in the Whisker app if an update is available, then run a test cycle.
- "Extended Scale Activity" notification — the Whisker app flags the weight scale as continuously triggered.
- Been going for 30+ minutes — the notification specifically means the scale has stayed active past that window.
- No obvious cause — your cat isn't necessarily even in the unit right now.
Your cat can still use the box, but cycles aren’t reliable. Scoop once by hand today so waste doesn’t sit in the globe overnight.
Why the scale won't stop triggering
This notification is a duration alert, not a fault code — the SmartScale is simply reporting continuous weight for longer than expected, which is usually explained by something completely ordinary.
Your cat is genuinely in there
Cats do sleep in the Globe, and the SmartScale is doing exactly what it should by holding the unit ready rather than cycling with a cat inside. This resolves itself the moment your cat leaves.
The baseline weight reading is off
Litter added without zeroing the scale afterward, an uneven surface, a recently moved unit, or an obstructed foot can all make the SmartScale read a phantom weight change that never clears on its own.
Rule out your cat first — everything else is a 10-minute fix.
How to fix it — step-by-step
Recently added litter?
A clumping litter formulated for the Litter-Robot keeps the fill line and weight readings accurate.
If the issue persists: replacement options
If the unit is level, the feet are clear, the scale is zeroed, and the notification still returns within the 30-minute window with no cat present, this is worth raising directly with Whisker.
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For most households, this alert is your cat napping or a litter refill that just needs a scale reset — reserve the support ticket for a notification that survives all of the checks above.
Advanced troubleshooting & diagnostics
How do I know if it's just my cat sleeping in there?
If the Litter-Robot 5 Pro camera is enabled, check the Whisker app's Live View or recent activity events first — it's the fastest way to confirm whether a cat is actually inside. On the standard model, simply checking the unit in person is the quickest confirmation before working through the placement and scale-zero steps.
Is this related to Overloaded Globe or Globe Position Fault?
They share the same SmartScale, so the same root causes — an unzeroed scale, uneven placement, or excess litter — can trigger any of the three. Extended Scale Activity is purely a duration alert with no motor involvement, so it's the mildest of the three and never blocks the Globe from moving on its own. If your unit is also refusing to cycle, check the Overloaded Globe guide next.
Frequently asked questions
Why does my Litter-Robot 5 say Extended Scale Activity?
The SmartScale has been continuously triggered for more than 30 minutes. The most common cause is a cat sleeping in the Globe; if that's not it, check placement and zero the scale with the Cancel button.
Do I need to do anything if my cat is just sleeping in the Litter-Robot 5?
No — the notification clears on its own once your cat leaves and the scale returns to its resting weight. It's a status alert, not an error requiring action.
How do I zero the SmartScale on a Litter-Robot 5?
Short-press the Cancel button while the Globe is at the home position. Do this any time you add litter or empty the Waste Drawer, since both change the baseline weight the scale measures against.
Conclusion
Extended Scale Activity is one of the gentler Litter-Robot 5 alerts — check for a napping cat first, then placement and a scale zero if it's not that. Let us know if it keeps returning after a clean test cycle and we'll help you dig further.
Still not fixed? Here’s what to do next.
Some faults are genuinely hardware, and no amount of cleaning or resetting will clear them. If you’ve worked through everything above and it’s still doing it, stop here rather than taking the unit further apart.
- Go to Whisker (Litter-Robot) directly. If the unit is still under warranty, let them replace the part rather than paying for it yourself — contact Whisker (Litter-Robot) support.
- Tell us what didn’t work. We rewrite bulletins when readers show us a case they don’t cover — compliance@pet-infrastructure.com. Tell us the model, what the lights are doing, and which steps you already tried.
- Ask other owners. r/litterrobot is active and full of people who have had the exact same fault on the exact same model. Search the sub before posting — the answer is often already there.
When to stop and call the manufacturer: if the fix needs the base opened, the motor or control board touched, or any tool beyond a screwdriver — stop. On a unit in this price range, opening it yourself usually voids the warranty, and a warranty repair costs nothing.
Did this actually fix it? 🐾
The complete Litter-Robot 5 bulletin library
Every Litter-Robot 5 bulletin published on the site, in one place:
| Bulletin | Covers |
|---|---|
| TB-LR5-001 | Litter-Robot 5 showing the wrong waste drawer percentage or a false Drawer Full alert?… |
| TB-LR5-002 | Litter-Robot 5 WasteID mixing up urine and feces, cycling too fast, or confusing which… |
| TB-LR5-003 | Whisker says a Litter-Robot 5 Pro firmware update can take 30 minutes and look frozen.… |
| TB-LR5-004 | Litter-Robot 5 won't cycle automatically? Here's every real cause — full drawer, sleep… |
| TB-LR5-005 | Litter-Robot 5 stuck on Obstruction Detected? Clear the dual pinch bars, fix a puffy… |
| TB-LR5-006 | Litter-Robot 5 globe stuck with a blinking red light? Fix the Overloaded Globe error —… |
| TB-LR5-007 | Litter-Robot 5 stuck on Globe Position Fault? Here's every documented cause —… |
| TB-LR5-008 | Litter-Robot 5 or Pro flashing red with Safety Bar Disconnect? Clear the pinch bars,… |
| TB-LR5-009 | Litter-Robot 5 stuck on Bonnet Removed even though it's on? Reinstall the bonnet… |
| TB-LR5-010 | Litter-Robot 5 or Pro stuck during WiFi setup? Fix credential errors, Bluetooth… |
| TB-LR5-011 | Litter-Robot 5 stuck on Motion in Drawer and won't cycle? Clear the notification,… |
| TB-LR5-013 | Litter-Robot 5 or Pro suddenly offline after working fine? Reconnect automatically,… |
Written by Alberto Guardia
I’m a physician working in medical informatics, and I run Pet Infrastructure on my own — no team, no manufacturer sponsorship, no paid placements. I share my home with Wolfgang, a 13-year-old Chartreux with firm opinions about litter and none whatsoever about firmware.
How this page was put together. Every light code, button sequence and timing here is traced back to Whisker (Litter-Robot)’s own documentation, to official support articles, or to several owner reports that agree with each other — and the guide tells you which. Where something genuinely isn’t documented anywhere, I say so instead of filling the gap.
How I check every guide → · Last updated August 2026