Cordless vacuum will not start unless the handle or body is tapped or shaken, and may cut out intermittently during use.

Safety first: Remove the battery before opening the unit.

• 1. Check battery fit: Insert the battery and ensure it locks firmly with no wobble. If it feels loose, inspect the latch mechanism and contacts for wear.
• 2. Clean contacts: Wipe the battery and vacuum contacts with a dry cloth. Light oxidation can cause intermittent power loss.
• 3. Wiggle test: With the battery inserted and the vacuum running, gently move the battery and handle. If the unit cuts out, the connection is unstable.
• 4. Internal inspection: Open the housing to inspect the battery connector and main PCB. Look for loose plugs, burnt areas, or cracked solder joints at the power input.
• 5. Repair or replace: Reseat connectors firmly. If solder joints are cracked, the main PCB or connector block should be replaced rather than re-soldered by non-professionals.