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Off Topic. I don't have GX yet, but I feel that Auto AC function without the fan speed would annoy the crap out of me (I live in socal). Is there a way to control the fan speed without going through the infotainment?
Little off topic... guess I never noticed the memory feature with HVAC settings.
The memory to key fob includes all the seat position, outside mirror position, A/C settings (modes and temp). You just need to link the key fob to one of the memory settings in the car.
As a follow up to this issue, I just got my GX back from the service department where they checked my auto re-circulate issue. The Tech said the air is staying in the re-circulate mode because it has been so hot here lately. He said when the temp gets to about 75 it will start switching from re-circulate to outside air , but that is not how my ES 350 works. It switches to outside air as soon as the car cools down or I put the temp up to 75 degrees. I'll see what happens as soon as it cools down a bit.
I have a Premium model with smog sensors, and live just north of the Dallas area. I have driven to Sherman, Texas where there should be very little smog, and the same thing happened. One of the tech guys at the Lexus dealership said his IS recirculate mode rarely goes into re-circulate mode. This doesn't sound right to me. It has been hot here, but my ES 350 is just as hot and goes into outside air mode after cool down. Just wondering if anyone else has had the same experience with a new model with smog sensors.
My 2015 Luxury GX has the same behavior, and behaves unlike any of my previous Lexus vehicles, or any other vehicles with auto HVAC systems. It almost never automatically switches to fresh air mode. I ran across the attached article in the November, 2017 issue of Motor Trend, which may help to explain why this is happening. The article suggest that manufacturers get some sort of off-cycle EPA credits when the vehicle is in recirculation mode, and therefore have programmed their HVAC modules to heavily favor recirculation mode. I have no idea what these credits are, or why they would be earned by having the vehicle in recirc mode. The article suggests that having the vehicle in recirc mode for long periods of time presents an issue of CO2 building in the cabin. All I know is that the Auto mode for determining whether outside air or inside air is distributed to the cabin is damn near useless. If anyone has any insight as to what this article is referring to, I'd sure like to hear it.
My 2015 Luxury GX has the same behavior, and behaves unlike any of my previous Lexus vehicles, or any other vehicles with auto HVAC systems. It almost never automatically switches to fresh air mode. I ran across the attached article in the November, 2017 issue of Motor Trend, which may help to explain why this is happening. The article suggest that manufacturers get some sort of off-cycle EPA credits when the vehicle is in recirculation mode, and therefore have programmed their HVAC modules to heavily favor recirculation mode. I have no idea what these credits are, or why they would be earned by having the vehicle in recirc mode. The article suggests that having the vehicle in recirc mode for long periods of time presents an issue of CO2 building in the cabin. All I know is that the Auto mode for determining whether outside air or inside air is distributed to the cabin is damn near useless. If anyone has any insight as to what this article is referring to, I'd sure like to hear it.
Russ
Russ, that's great information. My first question is weather you are still running auto mode in your GX? I think things are changing as some of the newer higher tech Lexus models, like the NX, don't even have the auto mode for re-circulation. I'm taking a trip to the Texas Hill Country next week, and am curious how the air acts. Thanks for your input, and the article.
Russ, that's great information. My first question is weather you are still running auto mode in your GX? I think things are changing as some of the newer higher tech Lexus models, like the NX, don't even have the auto mode for re-circulation. I'm taking a trip to the Texas Hill Country next week, and am curious how the air acts. Thanks for your input, and the article.
I do still leave the HVAC in auto mode while driving around the city, but for whatever the reason, it rarely goes into fresh air mode, no matter the season. I'm about ready to leave on a 5,000 mile road trip, much of which will be in the middle of nowhere, and I'll lock it down to outside air mode for the trip.
I rarely have passengers in my GX and cooling heating has always been good but was playing around with rear seat HVAC controls this afternoon.
Does everyones who has 3 zone operate this way?
Scenario
• Master climate set at 3 Zone
• Master is automatically using Face vents as it is warm in garage
• In rear I turn off AUTO and manually select FLOOR. Nothing comes out from under seat but I can feel air coming out of 3rd row floor vent
• I turn off master AUTO and manually select FLOOR for front. Now air comes out of the under seat vents
• No issues with overhead vents
I had assumed there was an HVAC bypass that would send air to under seat floor even if front seat wasn't using it and it was selected by rear seat controls.
Does everyone's do this?
EDIT: I need to look in FSM and OM to see if it actually states anything as well.
06-17-18, 07:02 AM
