Display shows F3, vacuum may not respond to trigger or runs intermittently

Safety first: Remove the battery before opening the handle or trigger area.

• Check trigger movement: Ensure the trigger moves freely and returns fully when released. If it feels loose or does not click, the mechanical lever may be broken.
• Inspect for contamination: Dust or sticky residue around the trigger can prevent proper operation. Wipe the area with a dry cloth.
• Open handle (advanced): If you are experienced with small electronics, remove the screws in the handle, carefully separate the housing, and inspect the trigger switch and small PCB. Look for broken plastic, cracked solder joints, or loose connectors.
• Replace trigger assembly: If the microswitch does not click or shows signs of burning, replace the trigger switch or entire handle PCB assembly, depending on parts availability.
• Reassemble and test: Ensure all wires are routed correctly and not pinched before closing the housing.