Airflow in vents not changing when selecting different positions on the dash. Currently stuck in Defrost and will sometimes blow to forward vents but never toward feet. Unsure if related to to this but the air blending seems to not work well as it will not maintain a temperature whether manually selected or set to auto. Unsure if electrical component issue/ wiring issue, or blend door actuator issue. (Or possibly vacuum issue, not sure how the doors are controlled)