Robert,

If you are talking about your heat pumps, I doubt if you have 3. Your zone 3 probably has cool only or at least On our 2018 Discovery with 3 zones, zone 2 has cool only. All 3 unit coaches I have dealt with have only had 2 zones that have electric heat. If you are talking about your propane furnace, again you only have 2. All are controlled through the same thermostat. somewhere on the display, probably at the bottom you should see you options. Gas or Electric when on heat and cool only when on cool. When on cool you can adjust your fan settings for low, high or auto. When low or high is selected the fan will run constantly and the compressor will continue to start and stop when cooling is required. Some choose this option to have steady noise in the coach to drown out some of the outside noise. Makes for better sleeping. If you select auto the fan will go off and on when the air conditioner starts and stop. You probably already knew all this, just thought I would throw it out.

Hope it helps

Jim Pinkerton

2018 Discovery 40D

We are also struggling with understanding Zones.  We have the 2 zones and know how to set on the thermostat.  However, Zone 2 does give us the option of "electric" which we assumed was the heat pump option.  Does anyone know if Zone 1 and 2 are in different locations? - hence LR and Bedroom?

We now are using the heat pump electric option -- it is only on Zone 2 but seems to be blowing out in ALL vents.  Is that the way Zone 2 works?  We are starting to think Zone 1 may only be "some" vents, but zone 2 is all.  Can someone clarify this>