Temp display Heat/AC controls quit working

Anyone have thier inside/outside temperature display only show 3 dash marks and the heat/AC controls stop working? Mine will do this intermittently. Also the fan will kick on high when it does this. If you shut the car off, then it will start working as normal again. Everything else works, just the temperature display and the controls stop working.

My guess is you have a bad ign switch.

Already replaced that when it use to die driving down the road. It seems isolated to the heat and AC controls. Looks like I'll have to dig. Doesn't seem like this is a common problem.

It was the HVAC programmer computer.