Cordless vacuum will not power on; display shows E1 shortly after pressing the power button

Safety first: Power the vacuum OFF and remove the battery pack before any inspection. Do not short battery terminals.

• Reseat the battery: Remove the battery pack from the handle or base. Inspect the rails and latch for debris. Slide the battery back in firmly until you hear a positive click.
• Clean battery contacts: Use a dry cloth or a cotton swab lightly dampened with isopropyl alcohol to clean the metal contacts on both the battery pack and the vacuum body. Allow to dry fully, then reinstall.
• Check for bent or recessed pins: Inspect the battery connector pins in the vacuum body. If any pins are bent, do not force the battery in. Slightly straighten with a non‑metallic tool if possible; if badly damaged, the connector assembly should be replaced.
• Test with another battery (if available): If you have a second compatible Levoit battery pack, install it and see if E1 clears. If the second battery works, the original battery pack is likely faulty.
• If E1 persists: Discontinue use. A failed BMS or connector can overheat. Contact Levoit support or a qualified technician for battery pack or main body replacement.