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There is a broken vacuum line, VERY thin, that seems to go to no where...upon checking around, I found a blend door vacuum servo that has no hose going to it...does this look like it goes here?
The default setting is to allow fresh air into the cabin. When vacuum is applied to the motor thru the white hose, the motor closes the recirc door and forces the a/c to get it's intake air from inside the cabin.
Keep an eye on those. Mine are all beginning to crumble and fracture. I have had to open the bundles they are in to get a good bit to put silicone vacuum hose over the broken end and tape it to the bundle as not to stress the OEM line to splice portions of it. The same thing is happening with my Mustang.