Crazy noise coming from the dashboard, notice it mostly when driving under 40mph

Hello, You may have an issue with your air conditioner system. There is a door to allow air through from underneath the windshield wipers, or recirculate the air through the vehicle, and you may be hearing air moving that door around. Also, you could have a bad blend or mode door actuator that is attempting to open or close a blend or mode door, and the sound may be drowned out over 40mph. You will want to turn the vehicle off, stick your head under the dash, and change the settings for the air conditioner with the blower motor on its lowest setting. You should hear the noise at some point.