Hey there, sorry you havent recieve any assistance.
My name is ***** ***** I can help.
If it will not go into defrost (front screen) )then you have an issue with the mode door actuator. WHen they atart to go they will make a loud clicking sound when trying to go into certain modes. The actualtor itself is relatively cheap but they are a pain to replace in most cases as it's so tight under the dash and any hands that are remotely normal to large size tend to get at up pretty bad in the process.