I bought mine about a year and a half ago and have two of them malfunctioning now, the toggle switch and the yellow.
I've searched their website and didn't see any. I searched this website and couldn't find any mention of it.
Not to my knowledge. You might be able to send it to them for repair but they'll charge you, that's if they'd even agree to fix it. TBH you'd be better of putting the money towards a better wheel anyway.