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 arming signal or there’s a safety issue. First, check your transmitter throttle stick is at the lowest position before powering up the ESC. Many ESCs require the throttle to be fully down to arm. Next, verify your ESC’s battery connection and ensure the voltage is within the ESC’s supported range. Low voltage or a bad connection can cause beeping. Also, confirm the ESC’s calibration matches your transmitter’s throttle range—recalibrate if necessary by following the ESC manual steps, typically involving powering the ESC while holding the throttle at max, then lowering it. Finally, inspect for any error codes in the beeping pattern (e.g., rapid or slow beeps) and consult your ESC manual for specific meanings. If the ESC still won’t arm, check for any motor or wiring faults, as some ESCs prevent arming to avoid damage. Following these steps should help identify and fix the issue.