I’ve posted on this sub before about my car having issues with the AC.

I thought the car had a leak in the lines going to the back. I took the car to the shop to get the leak diagnosed. Pressure tested, said there’s no leak. The Freon was very low to the point. The AC compressor was not kicking on, and so got that filled and immediately kicked on. This is the second time it’s been filled and the Freon went somewhere.

Not sure what you guys recommend I do next? From what I’ve read, it’s sounding like the evap core, but that can get expensive to do so I’m seeing what other options there are. And I heard that if it is the evap core, you’d be able to smell it in the cabin, which I’m not. Not sure where else the Freon could be going. This is a big leak that’s non- existent. Or something else entirely.

I got this done on Wednesday, and today (Friday) it’s low.

 

Seek professional help.

Find a shop that is expert in Toyota/Denso A/C systems and drop it off for them to find & repair the leak. Because it's obvious there's a problem (all the refrigerant leaks out in a few days) - at this point you're just playing guessing games.

Chip H.

 

I found the leak. It’s coming from the low pressure line - thicker line (which is the liquid line I believe).

I ordered the part from lexus. Is it recommended to replace both lines at the same time?

 

Whether recommended or not, I would, for peace of mind. Due to the fact the "Newest" 1st gen is already a decade old. Specially since you're already "In there" so to speak.

 

Makes sense. I’m curious how much of a difference it’ll make if instead I cap it off. I have a baby that sits in the back and am curious how big of a difference it makes. Should I just swallow the bullet and spend the $400 for parts?

 

It’s easy to test the evap core... when they filled the system, they most likely put uv dye in it.

Let the car sit over clean clean concrete and idle with the a/c on... then when a puddle of water forms... use a black light(real black light, not a painted bulb) and see if the water has an green glowing oil residue in it.

If not.... wait till night time and use the black light to look under the hood at the a/c components and any other accessible a/c lines... it’ll glow neon green where the leak is.

 

I only replace parts that are leaking... and make sure to use new O-rings... if a line has to be disconnected that you aren’t replacing... just replace the O-rings.


But I do my own work... so it may be o good idea to replace both if you are having someone else do the work.

 

Myra unfortunately a shop is doing mine so I figure just replace both lines. I’m also looking to replace the ac compressor drier.