I purchased my 2015 F56 a couple months ago and we just got our first major snow here in Iowa, so time to turn on the heater. I have the automatic climate control panel. Unfortunately, it only blows hot when I turn the temperature to max heat (84 degrees on the digital display). Even one click down to 82 degrees and it starts to blow pretty cold. Any idea what might be the problem? Is the blend door stuck or blend door actuator malfunctioning? Thanks!