A/C Recirculate Mode

[teegolf]

2014 Grand Cherokee Laredo. Wondering why the hvac acts like it is in recirculate mode with the A/C button pushed in manual mode. Have window cracked to force smoke and odors out of cabin. On vent mode it pushes air right out, in A/C mode it acts like recirculate is partially on and in recirculate mode it draws outside air in like you would expect recirculate to do. Trying to decide if I have something wrong or the nature of the beast. My GM vehicles do not act like this. Any input appreciated.

[brcidd]

Can you hear the air flow noise change as you select/deselect recirc mode? If extremely hot out system may go into recirc mode as designed even though you did not request it. Many cars/trucks will change to outside air when shut down so as to adequately shut the doors- you can always pop glove box back to observe recirc operation if you cannot hear it change modes.

Try defrost, there is a rule amongst a/c designers that recirc is NEVER activated while in defrost mode- otherwise fog-up when raining at 41-51 degs!