Xiaomi Mi Robot Vacuum B101CNPlease clean the main brushPlease clean the main brush — cause and how to fix it
Error code: Please clean the main brush
Your vacuum keeps giving this prompt even after you've cleaned the brushes because the hall sensor or the motor contact is worn out.
How to fix Mi Robot Vacuum B101CN Please clean the main brush
- 1
Inspect the brush ends for wear and check the socket for debris.
- 2
If it persists, replace the entire main brush motor assembly for about $20-30.
What this repair uses
Xiaomi B101CN main brush motor
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 Xiaomi Mi Robot Vacuum B101CN Please clean the main brush mean?
Your vacuum keeps giving this prompt even after you've cleaned the brushes because the hall sensor or the motor contact is worn out.
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 Xiaomi B101CN main brush motor. Compatible aftermarket parts are widely available on AliExpress and typically cost $8-60 depending on the part.
How do I contact Xiaomi support?
Xiaomi Korea unified its customer service line to 070-8015-1154 starting November 2025. Phone: 070-8015-1154
Official support
Xiaomi Korea unified its customer service line to 070-8015-1154 starting November 2025.
Online support
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