Why is my ESC beeping and refusing to arm?

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

Answer: Continuous beeping from your ESC usually indicates a problem preventing it from arming. First, check your throttle stick is fully lowered; ESCs won’t arm unless the throttle is at zero. Next, ensure your ESC and transmitter are properly calibrated—follow the manufacturer’s calibration procedure, which often involves powering on the ESC with the throttle at maximum, then lowering it to minimum when prompted. Also, verify all connections are secure, including the motor wires and receiver leads. Some ESCs beep if the motor phase wires are connected incorrectly—try swapping two motor wires and test again. Check your battery voltage; low voltage can cause arming failure. Lastly, confirm your ESC’s firmware and settings match your motor type (brushed or brushless) and battery cells. If it still won’t arm, consult the ESC manual for specific beep codes, as different patterns indicate different issues. Following these steps should help you identify and fix the cause of the beeping and prevent arming.