I would first try to make sure all the air is purged from the heating loop. If you have a laptop you can manually force coolant pumps on and open the diverter valves. Just don't have the pumps on 100 or you may cause cavitation which will only create more problems. You can do this with forscan and a laptop or I'm sure your dealer could probably do this too.
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)