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 configuration issue preventing it from arming. First, check that your transmitter throttle stick is fully lowered; ESCs won’t arm if the throttle isn’t at zero. Next, verify your ESC calibration: power up the ESC with the throttle at maximum, wait for the beep tones, then lower the throttle to minimum to complete calibration. Also, confirm your battery voltage is within the ESC’s acceptable range—low voltage can cause beeping. Inspect all wiring connections for loose or reversed cables, especially the motor phase wires and signal cable. If your ESC has a brake function, try disabling it as it sometimes interferes with arming. Finally, consult your ESC manual for specific beep codes, as these indicate particular issues like thermal shutdown or firmware errors. Following these steps should help identify and fix why your ESC won’t arm.