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 it’s not receiving the correct throttle signal or there’s a safety issue. First, ensure your transmitter and receiver are properly bound and powered on. Next, check that your throttle stick is at the lowest position before powering up the ESC. Many ESCs require a 'throttle calibration' to recognise the min and max throttle signals—consult your ESC manual for the calibration procedure, often involving specific stick movements during power-up. Also, verify all connections are secure, including the motor and battery leads. If your ESC has a low-voltage cut-off, ensure your battery is fully charged and within voltage limits. Some ESCs beep if the motor is obstructed or the propeller is attached—remove the propeller and try again. Finally, make sure your flight controller or receiver output settings match the ESC input requirements. Following these steps usually resolves beeping and arming issues quickly, letting you get back to flying safely.