is it possible your coolant is poor and freezing up..??
2010 FX4 Blue Flame SCrew 5.4L Black Leather int, fully loaded, SYNC\SONY\NAV Totalled and gone to F150 heaven..
2011 New identical 2011 replacement with EB has arrived .!! Sadly, No Sony/NAV
OOPS.!!stolen and totalled
2015 Ruby Red Lariat 5.0 replacement loaded except 502a