Heating / Air System on 2007 Lexus LS460

My LS460 heating and cooling system has to be turned on manually everytime the car is started. It use to come on automatically. I cannot find anything in the manual about correcting this. Do you have the answer?

Asked by for the 2007 Lexus LS460
you need a shop that possesses a scan tool that can acess the hvac system and check for codes and other functions. This can be costly.