Dual zone automatic temp control. Happens in manual mode, however, in dual control. Had to turn ac off for a while, then air flow was re-established. It appears as though icing occurs somewhere restricting air flow. After air flow was re-established, I turned off dual control (so that same temp in the whole cabin) , seemed to work better. Also kept temp a little warmer instead of real cold.
Fan controls work fine, I can hear it louder with increased speed. Thank you for responding.