Well, I came to this forum for a reason, and I'm not liking the answers I'm finding. I'm two weeks into owning a 2014 Transit Connect Wagon LWB. We sold all our vehicles and consolidated to this vehicle for an upcoming move to Russia. Rear heat was a big factor in our decision, and guess what.....it doesn't work. Same problems as you folks have described.
So far, in two weeks, I've got a folding seat failing (current has a tech bulletin on it) and a failing rear heater. I'm starting to have serious doubts about this vehicle.