Sorry to bring a post back from the dead but I figured someone might find this useful.
I have a 2013 MKS EcoBoost that I purchased used that recently began increasing the ac settings to heat/high. I tried to clean the captive buttons with glass cleaner to see if that was the issue but narrowed it down to a hardware problem. I called my Lincoln dealer and got a hold of somebody in the service department that told me this is a common issue. He also mentioned cars with no tint will develop this issue faster and that it would be ~$960 USD to replace the FCIM.
This part is easy to swap out. I did it in under an hour. The key, according to the service guy was to find the same part number (Ford loves to make multiple part numbers for the same item from year to year). I found a control panel off of a low mileage salvage car on eBay for $120. Mine came with the whole assembly and the ac vents on the center stack.
Install was simple - just take your time. Remove the small wood insert near the starter button and the trim piece around it. They clip in. Repeat this on the passenger side. Behind the trim peices you will see a 7MM bolt - remove that and carefully pull the control panel out and up. Disconnect the plug and swap in the new part. Reassemble and you're done.