Why does my ESC keep beeping and fail to arm?

Question: Why does my ESC keep beeping and not arm?

Answer: Continuous beeping from your ESC usually indicates a safety or setup issue preventing it from arming. First, check your transmitter throttle stick is fully down; many ESCs won’t arm unless throttle is at minimum. Next, ensure your ESC is calibrated to your transmitter’s throttle range: power on the ESC while holding full throttle, then lower it to minimum when prompted. Also, verify your battery voltage is sufficient, as low voltage can cause beeping. Inspect all connections for loose wires or poor solder joints, especially between the ESC, motor, and flight controller. Some ESCs beep if the motor is obstructed or damaged—spin the motor by hand to check for resistance. Finally, confirm your flight controller is correctly configured to arm the ESC; some require specific arming sequences or safety switches enabled. Following these steps should help identify why your ESC is beeping and prevent arming.