2004 Lexus IS300, Air conditioning/Heater not working properly - Lexus IS Forum
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post #1 of 5 (permalink) Old 01-25-2019, 02:42 AM Thread Starter
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2004 Lexus IS300, Air conditioning/Heater not working properly

I have waited to start fixing my Lexus because it was my only reliable vehicle right now, but I will soon buy another vehicle so I can start working on my car, finally.

Now, when my car is on and I turn on the air conditioning or heater, the air does not come out from where the knob is stationed at. If it is on full front body, by the feet, or on the one where it is both, it is not coming out from it. Instead, the air is coming out from the dash ports for the windshield. I do not know how to fix this.

Is this something I can do myself (I have very limited tools and space as I live in an apartment complex) or can I have someone go in, electronically and reset the computer that controls it?

Thank you all for any advice.

'04 Lexy
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post #2 of 5 (permalink) Old 01-25-2019, 10:29 AM
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Originally Posted by 1stIS300!! View Post
I have waited to start fixing my Lexus because it was my only reliable vehicle right now, but I will soon buy another vehicle so I can start working on my car, finally.

Now, when my car is on and I turn on the air conditioning or heater, the air does not come out from where the knob is stationed at. If it is on full front body, by the feet, or on the one where it is both, it is not coming out from it. Instead, the air is coming out from the dash ports for the windshield. I do not know how to fix this.

Is this something I can do myself (I have very limited tools and space as I live in an apartment complex) or can I have someone go in, electronically and reset the computer that controls it?

Thank you all for any advice.

'04 Lexy
Mode servo is bad. Replace the air mode damper servo. Google it and determine if your skill level is up to it.
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post #3 of 5 (permalink) Old 01-26-2019, 05:19 PM
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This thread may help. Sounds like the mode servo, rather than the blend servo, which is what I wrote about, but there info there which may help.

https://www.my.is/forums/f115/air-bl...ne-job-592537/
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post #4 of 5 (permalink) Old 01-27-2019, 02:40 PM
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Luckily, this is a fairly simple fix since the mode servo is much easier to get to rather than the blend servo.
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post #5 of 5 (permalink) Old 02-06-2019, 01:18 AM Thread Starter
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Thank you all. I will look at the suggested part and give an update soon.
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