Why is the auto-empty function not working when I dock my Shark BU3521 vacuum?
If your Shark BU3521 is not automatically emptying when docked, please check the following troubleshooting steps based on the user guide: Check the Dock…
Manuals+ Q&A
Shark BU3521 Clean and Empty Cordless Vacuum User Guide — questions & answers
Read product questions and troubleshooting answers linked to Shark BU3521 Clean and Empty Cordless Vacuum User Guide.
Browse topics
Answered questions
How do I remove the small triangular cup at the bottom of the dust canister for cleaning?
Based on the Shark BU3521 user guide, there is no specific instruction for removing a small triangular cup from inside the dust canister. The…