When I close the windows my ears Pop!

[CGlasel]

Is there an out-flow vent I can check on my truck? When I close all the windows, with the Vent (as opposed to recirc) and the fan on, make a real pressure spike. My ears pop like the cab is pressurizing. If the setting is on Recirc -- no problem.



There must be a blocked out flow vent or something. Can anyone help out with this?



--Charlie

 

[rbattelle]

This also happens to me, but it's happened to me in virtually every vehicle I've ever been in.



I'm not sure there's a vent, but there might be one at the back of the cab behind the carpet.



Ryan

 

[KSears]

there is a cabin air vent on the back wall of the truck cab. You can see it from the outside looking between the cab and bed . who knows if that could be the problem, appearrantly it must be behind the back seat upright portion. I don't know if it needs maintaining , if it turns out to be something that is ,please let us all know.

 

[skipro3]

Set your air controls to fresh air and not recycle air. On recycle the cabin is pressurized. On fresh air, it is open to outside air.

 

[CGlasel]

I'll look for a vent behind the back seat.



I've had a couple hands full of different vehicles over the years -- and none of them did this pressurization thing when closing the windows (when on VENT/FRESH air). Maybe a slight bump, but I'm talking about a significant Pop. Most, maybe not all, will add some fresh air even when on recirc.



Thanks for your replies. skipro, I understand the functions of the vent/recirc settings, thanks. Most cars & trucks do not pressurize on recirc.

 

[Hoefler]

The vents on the back of the cab have a baffle in them to keep out air, dirt and no see-ums. The positive pressure in the cab opens them, creating cross flow ventilation. The valves are not calibrated to any extent, there is bound to be a varying difference on how much pressure it takes to open them. In general, it is a rubber flap, they become stiffer when it is cold out, requiring more pressure to open.

 

[DZink24]

It's a cheap fix, but I just crack the rear pass. side window down about 1/8th of an inch to depressurize.