Water sound behind dash

Hello,

Yes, I have seen this before one of the HVAC control actuators is having a problem. Here is a guide to help walk you through the steps of changing it and the actuator locations for your car in the diagrams below:

https://www.2carpros.com/articles/replace-blend-door-motor

Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.