Just purchased a 2015 Discovery 40E and having issues figuring out these zones for heat and ac. Zone 1 appears to have the sensor on the side of the cabinet over the driver's seat. This sensor needs to be moved because when that side of the coach is in the sun it will read 95 on the thermostat due to the heat reflection inside the coach.

Zone 2 appears to have it's sensor on the wall by the half bath.

Zone 3 sensor is in the bedroom by the sliding door.

The heat zones are 1 and 2 for gas and electric and I assume electric is heat pump.

Zone 3 will say heat but not adjustable.

Zone 1 in AC mode is front of coach . . . Zone 2 in AC mode is middle coach . . . Zone 3 in AC mode is bedroom.

So if you have the bedroom furnace which I believe is zone 2 for heat it will not heat properly if the bedroom door is closed because the sensor is by the half bath and sensing what the temperature is in the middle of the coach and NOT the bedroom.

Am I correct in assuming this and how can this be corrected???

So I was able to correct the issue by moving the furnace wire from Heat 2 on the thermostat to Heat 3 and it now works like a dream. 

Now all I have to do is move the front sensor to a place where it operates properly and not subject to the radiated heat from the side window.