Why does my ESC keep beeping and refuse to arm?

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

Answer: Continuous beeping from your ESC usually indicates a safety or connection issue preventing arming. First, check your throttle stick or transmitter input: the ESC won’t arm if the throttle isn’t at the lowest position. Move the throttle stick fully down and try again. Next, verify your ESC’s signal wire is connected correctly to the flight controller or receiver, ensuring the correct channel is used. Also, confirm the battery voltage is within the ESC’s safe operating range; low voltage can cause beeping. If your ESC has a calibration mode, recalibrate the throttle range by following the manufacturer’s instructions—usually powering on with the throttle at max, then lowering it after a beep sequence. Finally, inspect for any motor or ESC faults, such as damaged wires or overheating. If the ESC beeps a pattern (e.g., a certain number of beeps), refer to its manual for error codes. Following these steps should help you identify and fix the issue so your ESC arms properly.