Air is stuck on upper vent cold. I pushed all buttons and nothing changes, heat, floor, defrost, mix, inside, outside, stays on cold upper. Air speed **** is all that works. Back controls same problem, turn ***** stays on upper cold, no heat, or position change. Checked fuses visually, nothing.
How would front actuators affect back system? Changed passenger side actuators blend and position, no change. Checked control panel buttons all look good and light up when pressed. If not actuators then electrical, what am I missing, Thanks

 

Sounds like your HVAC module went on strike. Disconnect the negative battery cable for 5 minutes as a reset. May need to have it reprogrammed.