I found that when I set the ac to "Auto", the Recirculation Button always "On". The fresh air can't come in. Anyway to make it off when use "Auto"?

 

It will automatically switch to fresh air by itself eventually.

 

I agree....at least that is the way it worked on my TSX.

 

Today I put it at "Auto", the recirculation button didn't on. Looks like sometimes they are not act together.

 

It usually uses recirc when it's super hot inside, then after it has time to cool off, it turns off the recirc.

 

I got it, today is not that hot, so it allows me to turn off recirc

 

You can hit the recirculation button and manually turn it on/off if you'd like. The climate control will still work automatically (as in it will hold the desired temperature) but it will just keep recirculating air.

 

LuvMyTSX is correct, when the inside temperature is very hot, the recirculate button will keep on.