The heat in my 2014 Tour quit today and I found the Thermostat locked up. None of the buttons functioned. The display showed that I was on gas heat and zone 1 was 48 degrees. I couldn't change the temp setting or the mode or zone. I did an internet search and found a reference about removing a fuse and disconnecting all ac appliances. I took the thermostat apart and found no fuse so I proceeded to unplug my shore power and turn off my coach and chassis batteries. I waited several seconds and turned the batteries back on and everything was back to normal. I then plugged into shore power and all is ok. I'm going to be warm tonight.