Air flow

Check the condensation drains for the A/C. What you are seeing may be a frozen mist from water being splashed through the evaporator.

I would just replace the recirculation actuator no mickey mouse if it is a bad actuator sounds like a bad one. Also move the mode position and see if the noise changes? I dont have a replacement information or even a diagram showing its location on the online repair manuals we use. But the recirculation actuator should be behind the glove box area.

The HVAC housing has a drain tube that protrudes through the firewall that you normally will see water draining from. You can usually locate this and blow compressed air though it. You can also remove the blower motor and inspect from there.

Check to see if the blend air door is working.