My 2012 with dual climate control changes settings on its own. The other day I watched as the temperature display started going down on its own 72... 71... 70... 69 until I set it back at 72 and it stopped. Tonight the passenger side came on by itself twice in the same trip. Is there a better fix than buying a new control module?

 

Make sure it isn't the physical *****. Although, not sure replacing them is cheaper than the HVAC module.

You could try removing the fuse for a minute to reset just the HVAC module. Or Forscan. See what happens.

 

When does it do it, while in the Climate screen or is the Climate screen off. My 2013 Mustang (Same as the system in yours) did that while under warranty and it was the screen itself, The only time it would do it was if the Climate screen was on though.

 

I don't have the factory nav so the display is the little one at the top of the dash.