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 ...
My thermostat has a "mode" button and I can cycle through fan only, cool, heat pump, furnace. I have to set this for each zone. What are you doing to turn heat on/off?
When you say the A/C "comes on too," are you saying the roof units start up AND you can hear the gas furnaces ignite?