Litter-Robot 3 no power: won't turn on at all
- Test the outlet first — plug in a lamp or phone charger to confirm it's actually live.
- Check the power supply label — should read 15V DC, 1000mA or 1A.
- Inspect the cord — for deformities, punctures, or other visible damage.
- Check the power jack pin — a collapsed pin inside the jack is a small, specific, and easy-to-miss fix.
- No lights at all on the control panel — not even the Power button.
- No response to the Power button — pressing it does nothing.
- The unit looks completely dead — silent, no motor sound, nothing on the panel.
Your cat may have no usable box right now. Cats that can’t get in will hold it or find another spot in the house — put a spare tray down before you start, so nothing depends on how fast this goes.
Why a "dead" unit is usually just power
No lights and no response looks like the worst-case scenario, but the setup chain has several simple failure points before the base itself.
Outlet, cord, or power strip
A dead wall outlet, a damaged cord, or running the unit through an extension cord or power strip instead of a direct wall connection are the most common causes — Whisker's own manual already warns against pushing the unit near a wall outlet that isn't a direct connection.
A collapsed power jack pin
Inside the jack connector, a small pin should sit split slightly. If it's collapsed — from a rough disconnect or a knock — the connection to the base fails even with a perfectly good outlet, cord, and power supply.
Together, the five checks below take less time than a single Clean cycle.
How to check power delivery
Work through these in order — no tools required.
Confirm the outlet before you touch anything else
A 3-prong outlet tester rules out a dead or miswired outlet in seconds, before you start disassembling the power jack.
If the issue persists: replacement options
If nothing changes after all five checks, the power supply itself — or, less commonly, the base — needs replacing. Third-party adapters are compatible alternatives to the official Whisker part; confirm the 15V/1A spec against your unit's nameplate before ordering.
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If a fresh power supply still doesn't bring the unit to life, that points toward the base itself, covered under WhiskerCare warranty or as a separate repair.
Advanced: the backup battery isn't a fault
What if it went dark only during a power outage?
If the unit was working normally and only went dark during a power outage, and an Optional Backup Battery is installed, that's expected behavior — not a fault. The unit switches to battery power automatically, indicated by the Power button becoming backlit by a yellow light, and the Night Light disables itself to conserve energy. Owners with a Backup Battery installed shouldn't run through this No Power checklist during an outage; it isn't the same failure.
This is a different symptom from a unit that powers on but has a solid yellow light with the Globe not moving — that's a mechanical or paused-cycle issue covered in a separate guide in this series, not a power delivery problem.
Frequently asked questions
Why won't my Litter-Robot 3 turn on at all?
Most often it's the outlet, the cord, or a power strip rather than the unit itself. Test the outlet with a known-working device first, then check the cord and the power supply label before assuming the base has failed.
What power supply does the Litter-Robot 3 use (voltage and amperage)?
15 Volts DC, 1000mA or 1A — similar to an adapter you might use for a clock radio or to charge a phone.
How do I check the power jack pin on my Litter-Robot 3?
Disconnect the power supply from the Base and look at the pin inside the jack — it should be split slightly. If it's collapsed, gently open it back up with something small; this alone restores power in some cases.
Is a yellow Power button light a power failure on the Litter-Robot 3?
No — a yellow-backlit Power button during a power outage means the Optional Backup Battery has kicked in as designed. That's expected behavior, not a fault, and doesn't need the checks in this guide.
Conclusion
Before assuming the base has failed, work through the outlet, the cord, and the small collapsed-pin check inside the power jack — Whisker's own diagnostic order puts all three ahead of a base or power supply replacement, and together they take less time than a single Clean cycle.
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 3 bulletin library
Every Litter-Robot 3 bulletin published on the site, in one place:
| Bulletin | Covers |
|---|---|
| TB-LR3-001 | Litter-Robot 3 stuck with a red flashing light? It means the Cat Sensor has been… |
| TB-LR3-002 | Litter-Robot 3 flashing yellow-red or blue-red? That's a motor jam or overload. Here's… |
| TB-LR3-003 | Litter-Robot 3 stuck with all three lights flashing? It can't find Home or Dump… |
| TB-LR3-004 | Litter-Robot 3 blue light flashing even with an empty waste drawer? The DFI sensor is… |
| TB-LR3-005 | Litter-Robot 3 yellow light flashing mid-cycle? A slow flash means the cycle was… |
| TB-LR3-006 | Litter-Robot 3 stuck on a solid yellow light with the globe not turning? It's usually… |
| TB-LR3-008 | Litter-Robot 3 waste sticking to the globe liner or the unit getting stuck mid-cycle?… |
| TB-LR3-009 | Litter-Robot 3 Connect stuck offline or failing app setup? Here's how the Wi-Fi… |
| TB-LR3-010 | Litter-Robot 3 acting up? Match your exact light color or pattern to the right fix —… |
| TB-LR3-011 | Every Litter-Robot 3 replacement part, from the $5 pinch contact to the $349 base, and… |
| TB-LR3-012 | The Litter-Robot 3 Pinch Contact and DFI Kit is $30 and holds four parts. What's… |
| TB-LR3-013 | Pinch contact, anti-pinch pins, LR3PINCH, LR34009 — one $5 part under five names, and… |
| TB-LR3-014 | Litter-Robot 3 globe not moving at all? The motor assembly is $48 and takes about 25… |
| TB-LR3-015 | Litter still sticking to the Litter-Robot 3 globe liner? Four causes, how to tell them… |
| TB-LR3-016 | A Litter-Robot 3 Connect that won't finish onboarding is either settings or hardware.… |
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