I saw a post that mentioned a hard rest when having issues with warning messages for the air suspension. How do you do a hard reset? Thank you

 

Disconnect the battery and either let it sit disconnected for half an hour, or take the disconnected negative cable and touch it to the positive cable.

Typically air suspension faults are not going to be cured by this. The codes usually indicate a compressor not refilling the system within the time limit (leaks in the system and/or worn out compressor).