Why does my ESC keep beeping and refuse to arm?

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

Answer: Continuous beeping from an ESC usually indicates it hasn’t received the proper arming signal or there’s a configuration issue. First, ensure your transmitter throttle stick is at the lowest position before powering up the ESC; most ESCs require this to arm. Next, check your ESC calibration: disconnect the motor, power the ESC while holding the throttle stick at full, then lower it to minimum once you hear the confirmation tones. Also, verify your battery voltage is within the ESC’s operating range—low voltage can cause beeping and prevent arming. Inspect the wiring for secure connections, especially signal and ground wires. If you’re using a programming tool or app, confirm the ESC settings match your setup, such as motor type and throttle range. Finally, some ESCs beep if there’s a fault like a short circuit or motor issue, so check the motor and prop for damage or obstruction. Following these steps should resolve the beeping and allow your ESC to arm properly.