My 15 is350 fsport is just started with the a/c not working occasionally. Now that its getting warm again I went to turn the ac on low and just blew out slightly warm air. Tried turning it on and off bunch of times with no luck. Went home and car sat for a few hours and then on my way to work, it worked perfect, nice and cold.
Tried turning it on again today and back to warm air again.
Has anyone experienced this issue yet?

 

Sounds like the a/c servo issue, which I believe is covered under warranty by Lexus. Basically the servo malfunctions and Lexus has to reprogram them or replace them. I think they sent out a service bulletin about it as well.

 

Is this for IS250 too?

 

I just received a letter today, the dealer Will Repair. Mine's a 2015 250.

 

Ok perfect thanks! I'll have to make a appointment

 

So I finally got my car to the dealer for my ac intermittently working and they told me I needed to replace the ac pressure switch which would be $400. I'm wondering if that's just lexus dealer price or I might be able to find a aftermarket switch and have a local garage do it. How many pressure switches are there in the ac system and where might they be located.
the dealer is a hike for me so besides the cost it's a entire day of driving to get there and back so hoping for a cheaper alternative if possible.

 

If they said it was the AC Pressure switch, then there is only one, part number 88719-33020.
I don't think anyone on here has reported a pressure switch failing, but certainly anything is possible.
The pressure switch basically tells the AC computer when the refrigerant level (pressure) is low...possibly indicating a leak. The system will not function if the pressure is low as to avoid any internal damage of the compressor.

 

Yes that's what they said, but I had to tell them about the ac servo recall cause they said there wasn't any recalls regarding the ac so I hope they are just telling me that. If there is only one switch I should be able to get repaired locally for cheaper hopefully. Thanks for the reply and info

 

Do you know where it is located exactly. Probably just fix myself if I can get someone to empty the system

 

It's between the hood latch and drivers headlight, near the horn.
The labor with this repair will all be in the evacuation, vacuum, and recharge.
To change the sensor will probably take 3 minutes.

 

This helped immensely!
My A/C wasn’t working this season, so before handing my wallet to a dealer, I did some investigation. And learning about the existence of this switch spurred my interest. Read the OBD-II codes (after paying $9.99 to get an add-on to OBD-Fusion to read more than the generic stuff) I found a B1423 code was set “Open in pressure sensor circuit / abnormal refrigerant pressure”.
I’d already determined that I wasn’t low on refrigerant, so it was either that sensor, or the compressor, and this code pointed squarely at the sensor.
Found a non-OEM replacement at a local parts store, swapped out the original sensor, recharged the system, and Woo-Hoo! Cold air again! Total cost: $50 for the sensor + $35 for refrigerant + $10 for the upgraded code reading = $95.

 

nice. Always good to see the little success stories and bank some knowledge from your experience.

 

Saved me a bunch of money. Found the exact oem switch on Amazon for under $20. $100 to exac and fill ac system and all fixed for $120 compared to $500 lexus wanted. Thanks everyone so much

 

Hi,
I saw your conversation regarding the AC Pressure Sensor. I have a 2014 IS350 that is diagnosed with a bad AC Pressure Sensor. I know where it is. Any ideas on where to get it repaired inexpensively? I see you're in Richmond Hill. I'm near Brantford.