LU950655

L40s pro ultra cliff sensor error

I have problem with my vacum l40s pro ultra with the cliff sensor, i clean the sensors and i hard reset the robot but nothing fixed, when you try ro start to vacum from the app stops and say the wheels doesn't toutch the ground check the cliff sensors
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2 Comment

Cleaned and reset and it's still throwing that — sounds like a fault. Email aftersales@dreame.tech with your SN and let them take a look.
18-10-2026 11:10:22 GB Translate

Hello,

We sincerely apologize for the inconvenience.

During normal use, dust or debris may accumulate on the sensors. For this issue, please carefully check the cliff sensors located on the bottom of the robot and clean them with a clean, dry cloth. Please refer to the attached image for the sensor locations.

If the problem persists after cleaning the cliff sensors, your case may require further assistance from our after-sales team.

After-sales support email:
aftersales@dreame.tech

When contacting our after-sales team, please provide the following information:

1. Proof of purchase / invoice
2. A photo of the serial number (SN) label
3. A brief description of the issue
4. The results of the troubleshooting steps you have already performed

These details will help our team review your case more efficiently and avoid repeating troubleshooting steps. Our after-sales team will evaluate your case and advise you on the next available solutions.
clean_cliff_sensors__2_ (1).png
19-10-2026 09:14:32 GB Translate

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