here are the codes...

Code Action
23 Blend door feedback control
24 ATC mode door feedback failure
25 Ambient temperture sensor failure
26 ATC in-car sensor
27 Sun sensor failure
31 ATC recirculate door stall failure
32 ATC blend door failure
33 ATC mode door stall failure
34 Engine temperture sense failure
35 Evap temperature sense failure
36 ATC head command failure

Overheating
 

I've Been Dealing With All These Problems, I Have Yet to Change The Thermostat, But I'm Wonder Why the Air/Heater Wont Read On The Dash?

knowing which car you have is the first step. and what issues are you having.