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Heat/A/C problems

Tiny
JOHN LOGO
  • MEMBER
  • 2007 LEXUS GS 350
  • 3.5L
  • 6 CYL
  • 124,000 MILES
I just bought the car last week and I was told it only needed a blower so I had one installed. Heat only comes from the defrost and for most of the time it is colder on driver side while the passenger side is normal. The weird thing is if I put the A/C on it blows somewhat out of the front vents not one hundred percent but a lot more than the heat! I should also mention that I had to change the battery and when I did that it tripped something and the alarm would not shut off had to have Lexus change the door actuator.
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Monday, April 9th, 2018 AT 12:18 AM

19 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Did Lexus resolve the air flow issue with the actuators? Do you still have the same issue?

Roy
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Monday, April 9th, 2018 AT 5:34 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
They did not want to give me a guess they wanted $185.00 an hour to take apart dash to test the actuators they estimated three hours to do it. I refused.
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Monday, April 9th, 2018 AT 5:48 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, sounds like a dealer.

The actuators could definitely be the issue. If the doors are not changing as commanded, this will result.

Try this. Remove the fuse for the HVAC system and wait ten minutes. Then reinstall the fuse and turn the key to the on position. Wait one minute before starting. That calibrates the actuators and see if that made any difference.

Roy
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Monday, April 9th, 2018 AT 6:11 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
In the fuse diagram there is about five that air conditioning do you know which one?
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Monday, April 9th, 2018 AT 6:14 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, diagram attached. The ETCS.
Image (Click to make bigger)
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Monday, April 9th, 2018 AT 6:22 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
Thank you so much I will keep you updated!
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Monday, April 9th, 2018 AT 6:26 AM
Tiny
ASEMASTER6371
  • MECHANIC
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Sounds good. Glad to help.

Roy
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Monday, April 9th, 2018 AT 6:28 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
Okay, so it looks like the mode servo is blown? Do you happen to know how to change it?
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Monday, April 9th, 2018 AT 3:22 PM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
And also the temperature one on drivers side?
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Monday, April 9th, 2018 AT 3:22 PM
Tiny
ASEMASTER6371
  • MECHANIC
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How did you determine that?
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Monday, April 9th, 2018 AT 3:23 PM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
When I went to pick up the car Lexus told me hose were the two problems even though they tried to rip me off. I do not understand them sometimes.
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Monday, April 9th, 2018 AT 3:24 PM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
Is there a step by step guide anywhere?
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Monday, April 9th, 2018 AT 6:45 PM
Tiny
ASEMASTER6371
  • MECHANIC
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Sorry was traveling yesterday.

You need a advanced scan tool to monitor the AC system to see if commands are sent to the actuators to verify. It is not as easy as checking wires anymore. You need to see commands from the system and see if that command is getting to the actuators.

That is why the dealer wanted that much money. You do not need a dealer for this repair at all. A shop with an advanced scan tool can perform this check without charging you $185.00 per hour.

Do you or can you get a scan tool that can read the data from the AC?

Roy
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Tuesday, April 10th, 2018 AT 4:19 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
I checked a few gas stations no one had one for AC.
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Tuesday, April 10th, 2018 AT 7:16 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
One of them told me to take off glove box and visually check.
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Tuesday, April 10th, 2018 AT 7:18 AM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
Okay, so it looks like the wheel is trying to spin but it gets locked up it spins a little.
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Tuesday, April 10th, 2018 AT 12:17 PM
Tiny
ASEMASTER6371
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Which wheel? What are you seeing?

Roy
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Tuesday, April 10th, 2018 AT 1:47 PM
Tiny
JOHN LOGO
  • MEMBER
  • 13 POSTS
I posted a video did it go through?
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Tuesday, April 10th, 2018 AT 5:39 PM
Tiny
ASEMASTER6371
  • MECHANIC
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No, have not seen it. Try it again

Roy
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Wednesday, April 11th, 2018 AT 4:48 AM

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