I have made a change to improve the amount of cooling air available to the seat vent fan. I used a Sunny D one gallon drink container and cut in half at the joint line and then trimmed so to provide a lip at the front. The lip of the container slides under the three ducts under the front seat with the objective that the sides of the container deflect the airflow into the seat fan inlet. With the air selected so it is blowing to the face vents and to the foot wells there is a noticeable improvement in the air flow and reduction in temperature of the ventilated seat.

 

Nice, thats a great idea.

 

Hope it works for you and I applaud your ingenuity. I refuse to put a cut-up juice bottle under the seat of a brand new $45000. luxury vehicle.

 

Goes with two juice cans on a string to link the phone for hands-free calling. LOL!

John

 

I have been experimenting with the same concept for the past week - I used a piece of cardboard that I slid under the vent and bent the tail edge upwards.

The good thing about this concept is that is directs air to the ventilated seat, and also sends some additional cool air towards you feet and legs, which I really like.

Whether you use a cut up juice bottle, cardboard, or just stick 'something' near the lower rear back of the seat like a pillow to keep the cool air under the seat, the bottom line is that it works (keeping you more comfortable).

 

@ cjlittle you must be an engineer lol

 

Now I have proven that it works I will be adding some luxury pile carpet to the rear face to give it a finish worthy of a Lexus.

 

The sun finally came out today after two weeks of rain and it got hot again, and I concur with cjlitte, the concept definitely works. After a while, my seats actually felt cool.

 

So simple, yet the Lexus engineers couldn't come up that. Good for you CJ.

 

We know that there isn't necessarily detectable air flow and that it's not air conditioned, but when you had one model year that was obviously working properly (both cooling and heating) and then you have another model year where neither one works correctly or at all, then it's clear there's a malfunction. We have consistent 80, 90 and 100 degree temps here in Southeast Washington. When we get in our car it's also scorching hot, and the seats stay that way, almost as if the heat feature is on.

 

Maybe you should share that with the Lexus service centers that continue to tell us that nothing is wrong with our cars!!!!

 

MKhart, at this time of year, we are 90+ every day here in South Florida my ventilation is working, especially with the DIY modification (my seats actually feel cool after a while and my legs and feet stay nice and cool). You should have your dealer check yours to insure they are working.

Additionally, I absolutely agree there should be more airflow. You can definitely feel cooling and airflow with the 2010 LS460 model. Although my 2011 ES350 seemed to work a bit better, it was not a lot better and these seem to get the job done (just barely). The biggest difference is I notice is that in the 2011, all the ventilation was directed to the seat bottom where the 2013 ventilates both the seat bottom and seat back, with the majority of the air going to the seat back.

A lot of airflow would have been really nice.

 

I went to Lexus about the heat/vent seats, they told me to set my AC to come out of the top/bottom or bottom setting. That way the cool air will be sucked up onto the ventilation option. It's working but I like your idea, not on a 46k dollar car. Sell your idea to Weathertech, they'll make it look better.

 

From the looks of the makeshift cutout, it looks like most of the air is pushed out to the back seats and not into the front seats. Maybe Lexus needs to hire CJ as their AC seat engineer.

 

Have been playing with the ventilated seats. As it has been quite warm in NJ, the cooling feature is of most interest to me.
The seats are linked to the fan controls on the AC.
If I have the seat controls on high, and fan on high, the ventilated seats on my ES 350 practically blow me out of the seat. Most of the ventilation is on the back not the bottom, but when it is a hot day, it gets cooler faster with my back cool than my backside.
When it starts getting cool , perhaps I will chime in on the heating feature.

So far so good...