Originally Posted by EbbTide

in that case you may want to try to get in touch with the seller you bought it from to see if they can help you get a replacement. Though I'm concerned since you said you've experienced somewhat erratic behavior before with your transmitter on other speed controllers. You don't by chance have an old radio and receiver, or maybe a friends that you can put in and try again. Because if the receiver is glitching then the speed controller won't really know when to calibrate. That's just something else to try before doing an RMA. Because if you do it'll most likely need to be sent to the distributor in Canada for replacement, depending on where your seller got it from.