Welcome. Check under the seat and make sure everything is plugged in. Some heated seats have a ribbon cable between the bottom and back pads; some have separate connectors. Mine is heated both seat and back, but it takes a while to heat up. I think that this is because of the ventilation pads. My Dealer told me that is just the way it works.
We could start a thread on bad backs. I have an artificial disc at L4/L5 and another one at L5/S1. L3/L4 is bulging - just a waiting game now! Holding everything together are 6 bolts and two rods!
Holy crap, dude. Next thing you're going to say is you have an artificial hip, and both knees replaced, correct?
I'll bet then your back loves you for the heated seats then.
2014 Cherokee Trailhawk V6: Deep Cherry Red w/ hood decal
Cold Weather Package | Tow Group | Convenience Package | Leather-trimmed Bucket Seats | Panoramic Sunroof | CD Player | 8.4Nav | 9-Speaker Sound | Tonneau Cover | Off-Road Accessory Kit