TheGrrrrr
GOLD Star
This is doubly true if you are running a fridge in back.
Just picked up immaculate '13 LX570 rear A/C not cold enough...intermittent driver footwell hiss
- Thread starter MrX
- Start date
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This is doubly true if you are running a fridge in back.
- Thread starter
- #42
Agree. In LC/LX setup there are 28 total vents, let them all do their jobs.
I had this same hiss from driver foot well and warm rear air on my 17 LC as well. Had dealer do an refrigerant evacuation and refill and all sounds are gone and every vent blows icy cold. The sound you're hearing in the driver foot well is definitely some kind of expansion valve cycling every 10-15 seconds.
- Thread starter
- #44
Yep. It's fixed now, you could hang meat in the truck. Probably a small leak not worth fixing unless it's reasonable cost-wise. It's just such a fluke because this truck is so.damn.clean. Back seats never even used. Never been off the pavement (until the day I got it) but the guy serviced every single 4WD component. It's never towed anything. It was just an interstate cruiser for the PO who traveled for work who was sick of the gas bill, got an ES hybrid. The horrible mileage doesn't bother us because we don't really drive very much, plus in 10 years people will be clamoring for old NA V8s like this truck has.
- Thread starter
- #46
Did you buy it new? How long until the A/C started to warm up? IMO small leaks aren't a big deal, our upstairs A/C unit has one...we just service it every year and add freon. The refrigerant I added to the truck was $40 with a gauge, pretty idiot proof. I will also keep this thread updated, but I think my air is going to be freezing for a very long time if not forever. If there were a hot desert to go off roading in, I would today lol.
- Thread starter
- #49
So today the rear air is warmer than yesterday, I’m 99% sure we didn’t use enough freon as there is still some left in the can. I’ll probably just take it to Mr Cool. Another great thing about these is they’re not Ferraris to service. Trucks are engineered to be easier to work on. I’m really not hesitant to take it to a place like Mr. Cool.
- Thread starter
- #50
How much did Toyota charge?
Lexus wants $285 just to recharge. Mr. Cool is $70 plus however much freon they add.
Do you know where this would be on the LC? I assume the same physical location, but we don’t have fixed cup holders. Mine has the same issue, rear not blowing cold enough but front blows ice cold.
- Thread starter
- #52
I’m not sure if that’s necessary. Just turn 4 zone off and crank driver temp down to low. That is max a/c. On low and high it’s just full blast cool or heat, nothing to do with the actual auto system.
bloc
SILVER Star
My 13 LC has fixed cup holders for the third row molded into the interior side panels. Below that is a very small storage pocket, and on the front side of that is the round module with the temp sensor and a plastic “roof” molded over the top to protect it.
Not sure about other years.
I can get a picture of this tomorrow if it would help.
Ah, makes sense! I must have missed the memo that we were talking about the third row(and not 2nd). I do have those build in cup holders. Will check it out.
I just had the same warm air problem. I brought it to my Indy guy and he said the Freon was perfect and believed it to be a physical obstruction like a crayon or something jamming a mixing door to where heat and cold were mixing to be warm. I was about to begin tearing out the seats and rolling the carpet back to save some labor cost and then drive it over to my guys shop. I decided to roll the dice first and take it to Lexus to have them diagnose. Thank God I did because they evacuated and charged it with Freon, added some dye to find a leak and gave me my baby back with ice cold air all around. It cost me $280 or so, but saved me hours of labor. The service guy implied that the LX air conditioning system was a little unique and therefore my Indy guy may have just been unfamiliar. I post this here for anyone researching this in the future. My Indy guy replaced my entire ac system on my 100 and has done plenty of ac work for me in the past, he’s perfectly competent, but clearly he misdiagnosed it this time. It sucks to pay Lexus, but for ac and other expensive systems I don’t really hesitate to at least have them diagnose. I brought it to them for the AHC flush simply to put the liability on them if they screwed the pooch. They did an excellent job and it cost me like $200.
Maybe your expert Indy dude didn’t need to replace the “entire ac system” on your 100……
He definitely did.
This thread was helpful. I've been dealing with the hiss for close to a year now and was under the impression the issue was the A/C bearing going out. The front A/C has always been ice cold since I started hearing the noise and the cool box also. I noticed the rear A/C not blowing as cold as it used to however that must have been a recent development. So the leak must be really slow. Anyhow I had to find out if this was the solution so I left work and hooked the gauges up at the house and sure enough the pressure was still within spec but was on the low side. knowing about the sight glass was nice, topped off the freon and all three units are blowing ice cold in silence. Glad I don't have to pull off the compressor and such...
