Wheezing sound with front defrost

I just bought 2023 Tundra. When i am turning on front defrost button, i am hearing a wheezing/whistle sound. Anyone experience this or know how to fix this?

 

I am having the same or similar issue. I have a video but can’t seem to post it. Sounds like an owl going “whoo whoo whoo”. I’ve noticed it mostly on cold starts. I have an appointment in the 16th to deal with multiple issues:
-rear passenger window chatters and stuttering opening and closing, especially in wet weather.
-moisture/wetness under drivers floor mat.
-the “whoo whoo whoo” noise.
-excessive noise from drivers side door.

 

My fan whistles when it is only on the floor. Super obnoxious where I won’t run it on my feet only. Even on the lowest fan setting.

 

Check for a ric flair in your engine bay

 

Mine has it. I’ve isolated it to the tube that sucks are in under the passenger glove box

 

My ‘23 Pro now has the whistle noise when set to dash vent only. Doesn’t happen with the combo vent settings. Coming from passenger side.

 

I had this in my PRO as well. My wife noticed a slight whistling noise one day when I turned off S-Flow to allow circulation into the back seats for my dogs. She closed the rear vent and the whistling went away and opening the rear vents the whistling came back.

Anyway, after a few trips the whistling has gone and has not returned.