Hi guys

I am new to this hobby and I just got a refurb RC18MT for my son for his b day. Out of the box the RC kind of jumps. It doesn't really move but it just makes the sound like it is gonna start kind of like a off/on even though I am not giving it any juice on the radio. Like an occasional click maybe.

Could this just be interference from another signal or something?? How do I know if I need to send this back, his B-Day is one week away so I would rather not do that.

Maybe there is a test or should I reset the ESC like the book decsribes?

Thanks