how do you pull codes manually at ac controller on 1997 Buick LeSabre

has dual zone system ,and should be able to retrieve codes manually just dont know for sure how,blowing hot on drives side with ac on the small arm coming out of hvac programer is not moving to cold on drivers side ,thank you novakid

Asked by for the 1997 Buick LeSabre
Interesting...I haven't heard of this...let me follow this question.