I am currently the "carer" for a 2006 Fleetwood while its owner is in the hospital. It has a 2-zone heat system. During the day, I turn the heat off; at night, I turn the heat on BUT the A/C comes ...
Are the ACs reverse cycle heat pumps? Let them run a little while and see if you get hot air. Also, try setting the temp only a few degrees above the inside temp and then bump the temp up keeping within four degrees of the inside temp.