Cordless vacuum display shows E9 and the unit may start and stop repeatedly or not start at all.

Safety first: Remove the battery pack before working near the trigger or handle area.

• Check for physical obstruction: Inspect the trigger or power button area for dirt, sticky residue, or foreign objects. Clean around the button with a dry cloth or a slightly damp cloth (do not let liquid enter the housing).
• Operate the trigger repeatedly: With the battery removed, press the trigger 20–30 times to free any minor sticking. Reinstall the battery and test.
• Inspect for mechanical damage: If the trigger feels loose, does not spring back, or is physically broken, the trigger assembly will need replacement.
• Avoid liquid cleaners: Do not spray cleaners directly onto the handle or trigger; apply to a cloth first.

When to call a technician: If E9 persists and the trigger feels normal, the internal switch or flex cable may be faulty. These parts require disassembly of the handle and should be serviced by a professional.