Vacuum turns on only when the handle is held at a certain angle or when the tube is twisted.

Safety first: Remove the battery before inspecting connectors.

• Inspect the battery contacts and housing for wear or looseness. Gently bend spring contacts (if present) to improve contact, without deforming them excessively.
• Check the connection between the main body and extension tube; ensure it clicks firmly into place.
• Test the vacuum with and without the extension tube. If the problem only occurs with the tube, replace the extension tube with wiring.
• If the issue persists regardless of tube position, the fault may be on the main control PCB or internal wiring, requiring professional repair.