Roborock S5 MaxError 4Error 4 — cause and how to fix it
Error code: Error 4
Error 4 on your Roborock S5 Max means the dustbin isn't installed or is blocked, often triggering a "dustbin full" error even after emptying.
How to fix S5 Max Error 4
- 1
This usually points to a problem with the small optical sensor that detects the dustbin.
- 2
Sometimes dirt or dust builds up on the sensor, or the sensor itself fails.
- 3
First, thoroughly clean the dustbin area and the sensor window (it's usually a tiny clear plastic piece).
- 4
If the error persists, you might need to open the robot and replace the dustbin detection sensor board.
- 5
A replacement sensor runs about $10-25.
What this repair uses
Roborock S5 Max dustbin sensor module
Take it out, clean it, and seat it again before you replace it. If the error stays, this is the part to change.
Frequently asked questions
What does Roborock S5 Max Error 4 mean?
Error 4 on your Roborock S5 Max means the dustbin isn't installed or is blocked, often triggering a "dustbin full" error even after emptying.
Is this a hard repair to do myself?
Most of the steps above take 20-40 minutes with basic tools like a screwdriver. If you'd rather not open the unit yourself, contact the official support line below instead.
What part do I need?
You'll need a Roborock S5 Max dustbin sensor module. Compatible aftermarket parts are widely available on AliExpress and typically cost $8-60 depending on the part.
How do I contact Roborock support?
Roborock Korea official customer support. 1-year warranty. Phone: 1566-5534
Official support
Roborock Korea official customer support. 1-year warranty.
Online support
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