Viomi Alpha Pro 2 Main Brush Error Won’t Go Away

I purchased my Viomi Alpha Pro 2 robot vacuum about three years ago. For the past two weeks, it has repeatedly displayed a main brush error. After running for a short period, the vacuum reports that there is a problem with the main brush, immediately stops operating, and leaves the cleaning cycle unfinished.

I removed the main brush and cleaned it thoroughly, but the problem continues and I am no longer able to use the vacuum. Although the product is still covered by its warranty, I have not yet contacted customer service or opened a service request.

In addition, ever since I purchased the vacuum, I have been dissatisfied with its overall cleaning performance because it has never emptied or cleaned the dust bin effectively. Due to both this warranty-covered defect and my overall dissatisfaction with the product, I request that Viomi replace my robot vacuum with a new unit at no cost. If a replacement is not possible, I request a permanent repair free of charge under the warranty.