Okay, that sounds more like an internal solder joint issue. Not uncommon after most companies switched away from lead based solder. The high tin stuff loves to fail. Do you notice it being better or worse if the temperature changes and causes the board to flex?
You could pull the init out and check the connections to it, It's very easy but don't do it when it is very cold, the entire trim panel just pulls off and if it's cold it can be more easily broken.
You tilt the steering wheel down as far as it will go, then gently start at one side and pull the panel off, there are multiple clips that hold it to the dash. Once it is off the control head comes off with 2 screws and clips.
One thing to do if you disconnect it would be that it needs to be calibrated. For this you simply re-install the parts, then remove the HVAC/ECAS fuse for 20 - 30 seconds. Re-install the fuse and start the truck. Don't touch the controls, the unit will re-calibrate in about a minute. You do this same thing if you put a replacement control unit in, just be sure the replacement matches the options your truck has.
It is possible to test the system further but it requires a scan tool to do much of it.
Images (Click to enlarge)
Wednesday, October 16th, 2019 AT 3:18 PM