• Low battery voltage or power drop during startup
• Poor, loose, or faulty ground wiring connection
• Physical obstruction or fan rubbing against the internal housing/sensor
• Defective blower motor or internal control board
• Check and recharge the power supply/battery to ensure stable voltage under load
• Inspect, clean, and secure all power and ground connections
• Manually check the fan blades to ensure they spin freely without friction or obstruction
