Smelly fresh air system
Hi all, I am new to this forum and am having a problem I hope you can help me with. I have a 2005 Sienna that has 18k miles on it. Whenever I turn on the vent (blower)without the AC and set it to recirculate the cabin air, there is a foul odor that comes from the vents. It doesn't go away after a few minutes but if I turn on the AC back on, then it goes away. The cabin air filter is not supposed to be change until 30k miles and it doesn't look very dirty. Has anyone experienced this before or have any suggestions?
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