Roborock S5Roborock S5 Error 4Roborock S5 Error 4 — cause and how to fix it
Error code: Roborock S5 Error 4
When your Roborock S5 displays "Error 4," it's telling you there's a problem with one of its cliff sensors.
How to fix S5 Roborock S5 Error 4
- 1
These sensors prevent the robot from falling down stairs, and if one is dirty, obstructed, or faulty, it'll trigger this error.
- 2
Start by thoroughly cleaning all four cliff sensors on the underside of the robot with a dry cloth.
- 3
If cleaning doesn't work, you might have a bad sensor board.
- 4
Individual cliff sensor boards for the Roborock S5 are available for about $10-25 per sensor.
What this repair uses
Roborock S5 cliff sensor board
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 Roborock S5 Error 4 mean?
When your Roborock S5 displays "Error 4," it's telling you there's a problem with one of its cliff sensors.
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 cliff sensor board. 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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