byroncat

You might try the answer suggested by Puppo . It seems to have worked for me.
Byroncat

byroncat

Look in your owners manual under cabin filter. It is pretty clear but REMBER TO SET THE A/C TO RECIRCULATE before attempting this procedure.
Byroncat

LindaGil

Just wanted to add... I had the same problem with the display and not showing any temp. and the a/c not coming on for like 45 sec.! I had changed the cabin air filter but did not reset it. I looked in the manual and this is what has to be done.... Start the car, press and hold the A/C off switch for at least 4 seconds, you will hear... beep beep beep. Once you hear this, it has been reset! Works like a charm now. I am also including a link I found showing all instruction for removing, replacing and resetting! Hope this helps!

https://www.clublexus.com/forums/ls4...er-change.html

Linda

Well today, it is doing it again! So I guess I haven't figure out the fix!!!

charlesc

After 161 pt. inspection of "new" LS 460 AWD. Found A/C fan motor unbalanced and rubbing making a loud lawnmower sound when A/C on. Getting replaced even though no warranty left.
Part not available in N/A, coming from Japan. As for seat- tried out a California car & seat was truly cold. Big difference from my own feeble tepid seat chiller. What about a booster shot of refrigerant?
CC

charlesc

Sorry, iPad ran out of charge just as I was finishing up post. It seems as though there is always something wrong with the car---but it is a beautiful car. Technologically superior in almost every way. It has its quirks,but as a whole it's sublime.

FSP460

Thank you, it seams our dealer got it wrong, let see if it works as desired next time. The filter in my case was not sitting properly on the base.

Thanks again!!

rgs92

78 degrees? OMG that would bake me. That's really hot. I'm always at 65 all year long. (LOL, I set my house at 71 F.)

elzroy

recently the temperature display light on the passenger side of my 2016 rx350 started blinking on and of at times. it had never done this before. the dealer is saying this is normal. I have a friend with the same auto and theirs does not do this. also a few times the navigation screen has completely blacked out for about 7 seconds and then comes back on.

DrQuality

EXECUTIVE SUMMARY: My symptoms were exactly the same as described by puppo420. And his solution/approach resolved my problem. Thank you puppo420 !!

DETAILS: The problem was just as puppo420 described. At startup AUTO climate control light comes on and cannot be turned off, the RECIRC button is not lit at all, the climate system is otherwise not working, no fan, and cannot be operated in any way, no display of temperature selection on either driver or passenger side. Then, after about 1 minute, 15 seconds, the AUTO light cuts off, the NAV screen displays message that A/C is now off, all climate settings have been forgotten, the temperature selection defaults to 75° on both sides of cabin, and climate controls can now be manually operated/set. If the vehicle was only shut-off for a short period of time, the condition did NOT reoccur; if shut-off for a longer period of time, the condition DID reoccur.

When the problem first occurred it had been almost 10 months since the cabin air filter had last been changed/accessed, and the vehicle is a daily driver, so it was unlikely I had damaged the blend door system when I changed out the filter. Further, with the black access cover removed, I could observe the blend door opening and closing correctly when I operated the RECIRC button on and off. In fact, I can't see how someone could even TRY to change the air filter out with the RECIRC button off because, with the blend door closed, there would be absolutely no access to filter's frame/case or its retaining clips unless you were to SERIOUSLY pry open the blend door for access.

I found that the left-side white retaining clip (the clips face inward toward the cabin) on the white air filter frame/case was snugged/clipped-in properly, however the right-side WHITE RETAINING CLIP WAS NOT SNUGGED/CLIPPED-IN PROPERLY. It was a bit loose and so I could make the right-side of the frame/case wiggle up & down a wee bit with one finger. I pulled out the frame/case and the filter was installed in the correct up/down orientation. Though I could not detect any meaningful difference between one end of the filter and the other, I rotated it 180° anyway, ensured it was snugged and positioned well into it frame/case, and reinstalled the frame/case into its position. I ensured both white clips were properly snugged/clipped-in. After that, THE PROBLEM WAS ENTIRELY SOLVED. Just to warn any other mechanic (or such), I put a DYMO label on the black access door warning that RECIRC mode must be on before removal, else expensive repairs will be required.

CONCLUSION: I think the problem was being caused by the one white retaining clip not being fully clipped-down into place. I must have not fully-secured it during the last change and it had wiggled loose over time. There must be some kind of sensor in there that can detect when the air filter is not EXACTLY in place due to clogging or whatever. And if that sensor is 'tripped' then the AUTO button is turned ON and the climate settings are deleted - as a 'warning' that the required cabin air filter is 'missing' and/or needs replacing. And my frame/case was out-of-place just enough due to being unclipped - or was being pushed out-of-place just enough by the blend door when it closed because it was unclipped - to 'trip' the warning. (Too bad that warning isn't documented in the owner's manual.)

UPDATE: After about a week, a couple of dozen engine starts, I turned on the A/C and then THE PROBLEM STARTED RE-OCCURRING. I started the vehicle, turned off the A/C and made sure RECIRC mode was on. I then removed the white frame/case, made sure the air filter was well-seated within it, then inserted the frame case again. It took about six cycles of this before the problem stopped reoccurring. Two weeks passed and the PROBLEM STILL DID NOT REOCCUR.

When I was cycling the reseating of the white frame/case, I noticed another two possible root causes: (1) the right-side white retaining clip on the white frame/case had become very flimsy, as though the plastic was partially broken at its elbow, and (2) the aftermarket air filter I have been using had some left-to-right 'play' when installed in the white frame/case, maybe about a quarter of an inch.

So, even though the problem was NOT reoccurring, I purchased from a Lexus dealership a new white frame/case (88899-3A080, Denso, about $20) and a new OEM air filter (87139-50100, Toyota/Lexus, about $45). When I installed the new OEM white frame/case, the two white retaining clips made much louder, more audible, clicks when seating and the frame/case feels much more firmly seated. I also noticed the front of each clip had a small black vertical mark on it that, I would guess, is where the factory has assured the clips are providing the required tension. It has been a week since I swapped in the new OEM parts … and the problem has still NOT REOCCURED.

UPDATED CONCLUSION: So, again, it appears that the seating of the white frame/case and or the air filter itself CAN be the root cause of this problem. IT DOES NOT ABSOLUTELY HAVE TO BE caused by that hard-to-access servo motor/gizmo, though it apparently can be.

(Take note the OEM air filter part number I just stated above is the filter that actually shipped with the vehicle when new. There are also some less-expensive 'YZZ' Toyota/Lexus air filter part numbers now attached to the vehicle that are actually more cheaply constructed, with fewer pleats & no activated charcoal. I would guess these air filters are designed & priced so as to better compete with the less expensive aftermarket air filters and give dealerships an opportunity for a increase in profit margin.)

Happy motoring!