Auto recir. button
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Lexus Test Driver
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From: MA
Auto recir. button
Does anyone know how the auto recir. button work on the HVAC system? Does it switch to recir mode when it senses smog or does it go thru some charcoal filter?
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Thread Starter
Lexus Test Driver
Joined: Oct 2005
Posts: 8,809
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From: MA
So if the button's auto and outside air light is on, and it detects smog, it should switch to outside air and auto light stays on right? The reason I ask is that I was beside a SUV yesterday and I can smell his exhaust thru the vent, but the outside air light never switch to recir mode and I have the sensitivity setting on max. The manual does not explain this function too well and I had this car for exactly one day, still learning all the functions 
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From: BC
So if the button's auto and outside air light is on, and it detects smog, it should switch to outside air and auto light stays on right? The reason I ask is that I was beside a SUV yesterday and I can smell his exhaust thru the vent, but the outside air light never switch to recir mode and I have the sensitivity setting on max. The manual does not explain this function too well and I had this car for exactly one day, still learning all the functions
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Lexus Test Driver
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From: MA
What the temperature was outside? Mine stops switching when temp reaches 39F. 41F and up works just fine. I had a loaner couple of times - same story. I guess Lexus is hiding some major mulfunction or undocumented "feature" from us... I love auto mode when it works, because of long comute to work...
Its winter here in New England, so the temp. is well below 39F. I have not seen it switch yet and my auto function shuts off everytime I shut off the car.
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Driver
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From: NY
What the temperature was outside? Mine stops switching when temp reaches 39F. 41F and up works just fine. I had a loaner couple of times - same story. I guess Lexus is hiding some major mulfunction or undocumented "feature" from us... I love auto mode when it works, because of long comute to work...
I've had previous cars with automatic climate control that in cold weather will recirculate the air when first trying to generate heat; but my GS does not seem to do that, or at least not that I've noticed.
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I suggest that you put charcoal filter for AC, thats first thing I will be doing on next service.
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From: California
You can adjust the sensivity of the smog sensor. Just hold down the [auto, recir] button and it will take you to the adjustment screen. I just figured this out and changed mine to high to see if it actually works when smog is detected.
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