Trying to get cold air!!!!!!! 93 Bonneville SSEI
 

I've got an 93 SSEI. with the air on 60 the air blows slightly cool at best. The system is charged fully and when running, the low pressure hose get really cold so I know the system is working. but could there be a vent thats not fully closing? is it vacuum or cable? behind which part of the dash should I look and would it be easy to see if functioning? Any help please.

the contol is electric well should be sense its an SSEI