I searched youtube for the video to post on how to enable the learn mode using the emergency flasher but cant find it now. Anyway, all you have to do is turn the hazard lights on/off 3 times and it will do the same thing as pressing the brake pedal and turning the ignition on/off method. This worked on my 2010 F150 also.
For clarification---the sensor part numbers are different for my f150 and edge. I had good luck with the sensors on my f150, so i purchased the same brand (different part #) for my edge.
I have emailed the manufactuers website explaining the trouble i'm having in hope they can give me some suggestions on things to try or replace the sensors.