Diesel Tuner Pros
Since installing the tuner (Mini Maxx) on my 2012 the heater resets to "Low + A/C", it wouldn't be such an issue but I live in Canada. Has anyone heard or dealt with this?
Sorry, I've never heard of that one before. The tuning is not going to change anything with the HVAC system. Maybe try returning to stock and see if you get the same issue? If you do, it's not the tuner. Sorry I couldn't help further.