People ask us why their Castle Creations Thunderbird ESC produces a beep every 30 sec. This is a normal behavior of the Castle Creations Thunderbird brushless speed controllers. Because your Thunderbird ESC does not have an LED to make sure that a connection is present, it beeps once every 30 seconds or so just to let you know that the battery has made a connection and there is power to your unit.

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Phone: 1-800-979-9794 / 306-955-9907
Email: info@rctoys.com
Web: www.rctoys.com
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