Roomba j Series and Combo 10 Max
Roomba j Series and Combo 10 Max Error 4: Left wheel cannot turn
Quick answer
Error four (4) indicates your robot's Left Wheel cannot turn.
Editor: Feroz Sheikh · Updated · How we verify
Exact message and stated cause
| Where it appears | Message | Manufacturer's stated cause |
|---|---|---|
| j Series / Combo 10 Max chart | Clear the wheels, then press the button | Left wheel stalled. Left wheel is jammed |
Check your model first
These instructions cover Roomba j Series and Combo 10 Max (Roomba Combo 10 Max, Roomba j5, Roomba j7, Roomba j7+, Roomba j9+ in this catalog). Match the full model name and the complete message before continuing.
Manufacturer checks in order
- Check the Left Wheel for obstructions.
- Push the wheels up and down several times and shake out any loose debris that may be trapped in the wheel well.
- Briskly turn both wheels by hand, ensuring they turn freely and that each wheel exhibits the same amount of resistance.
- If the wheels cannot be turned by hand or if the error persists on flat surfaces when there is no obstacle present, you may need a replacement Left Wheel Module.
Safety notes
Use the instructions for your exact robot and dock. Stop if the unit is wet, unusually hot, damaged or has a swollen battery. Contact the manufacturer; do not bypass sensors or open sealed electrical assemblies.
When to contact support
If you believe you're in warranty, please contact iRobot Customer Care.
Part usually involved
Only if the checks above fail. The manufacturer article, not this site, decides whether a part is needed.
Wheel module
VacPartFit has no sourced wheel module page for these models yet. Use the manufacturer's own ordering route and match the exact model first.
Before buying a part
No. An error code does not prove a part has failed or that a seller's replacement fits. Check the exact manufacturer identifier separately.
Questions about this error
Which models does this guide cover?
These instructions cover Roomba j Series and Combo 10 Max (Roomba Combo 10 Max, Roomba j5, Roomba j7, Roomba j7+, Roomba j9+ in this catalog). Match the full model name and the complete message before continuing.
Does this error prove I need to buy a replacement part?
No. An error code does not prove a part has failed or that a seller's replacement fits. Check the exact manufacturer identifier separately.
Official sources
This guide summarizes published manufacturer instructions. It does not claim a hands-on repair or physical fit test.