I may be wrong here but my understanding is that in the auto mode, the recirculation will not come on unless the inside of the vehicle is very hot. I think there is a sensor or something that turns it on automatically when it is needed for optimal cooling. I had the same question when I got my H2. I don't like the auto mode at all. I just run the AC on manual mode and control the temp by adjusting the fan...but you do have to press the recirculation button every time you start the H2. I wish that they would stay on all the time...but oh well. If there is one compaint I have with the H2 is the AC system...I think they could have done a better job.
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