- Car
- 2017 QX70S
- Name
- Andy
If the sound only be heard at re-circulating, I would check the flapper/door. you can be reach it from the battery compartment after you you take the battery out. Just make sure that nothing got caught in the passage. You can possibly drop the glove compartment, remove the interior filter, and peek or reach in there and making sure the flapper/door can move freely. Have you try running re-circulate in heater mode. I know, just to check to see if the noise is only in re-circulating mode.