2015 Limited Diesel - My wife noted this morning on her way to work that the cabin heater has stopped working. Worked fine yesterday???? The blower fan works fine, the temp select can be scrolled up and down on the U connect touchscreen but no warm air comes out of the vents. As a starting point to resolve this problem, has anyone here on the forum had a problem similar to this? If so any tips on what direction I should take to resolve this problem?