2018 CPO, owned for ~7 months, 64xxx miles. Bought the extended Toyota warranty as well, which may become relevant. Cabin air access cover has the three-languages white sticker with black lettering.
My dash button was stuck in the recirc position from when I first picked up the LC in May, but mysteriously I noticed it had been stuck in the fresh air position for the past 2+ months. I don't ever use this feature, on any vehicle, but then again I've never had a problem with fogging or trying to keep out bad outside smells in the past.
Last time I checked during the spring / summer (thanks to this and the other threads), I was firmly in the "recirc button does nothing" camp, with the bellows / flap / whatever stuck in the "up" position = recirc = free access to the cabin air filter. No buzzing, no whirring, no clicking, no movement, no change in the status light on the button itself. I assumed it was broken, and "explained away" the fresh air side of the dash button being lit more recently as either (1) the flap had fallen down, (2) the system had spontaneously fixed itself somehow, (3) servo motor mis-calibration, or (4) the lights on the button are designed to maximize confusion rather than indicate the actual position of the flap.
Anyway, I drove last night to and from the big family holiday party - 37 degrees, rain / a little sheen of slush for about an hour each way, with four mouth breathers and one dog inside. The front and side windows fogged up the whole way, both ways, with only the front defrost setting for 20-40 seconds clearing it off each time. On and off every minute or three - very annoying. It seemed as though the system was stuck in "recirc", despite the annunciation of "fresh air" according to the button light.
So, this morning I cleared out the glove box and checked in the driveway...flap was in the "down" position = fresh air. Eventually, after much button pressing, got it to retract to the "up" position, but it then remained stuck there. I was able to pull it down to the "down position" with a gentle fingertip pull, but the gasket wasn't level / flush in the front - the back right corner of the flap was somehow disconnected or otherwise out of its slot. With a very light push, the flap popped into place - the down position.
Repeated this whole cycle one more time: repeated button pushing, eventual flap retraction to the "up" position, then dead button, much frustrated button pushing, changing of climate settings through all of the defrost settings, etc. I manually pulled the flap down again (straight to the correct position this time) and left it there. I couldn't see anything obviously broken on the flap, so maybe this is an intermittent problem with the part that gets moved by the servo motor and it's interface to the right side of the flap? But if it was stuck in down / fresh air last night, then why was I getting consistently, repeatedly fogged windows?
I guess it's off to the local Toyota dealership to see what they propose. I've already been down the road once with Toyota dealers with this vehicle, including getting Toyota corporate involved over the BS from the selling dealership. If I hear any of this "sorry, not a warranty-able claim" stuff I'm not sure how I'm going to respond.