Air conditioner if I turn the fan on high, the A/C turns off?

Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 2007 SATURN VUE
  • 3.5L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 136,000 MILES
My A/C only comes on when I turn the fan on but, if I turn the fan on high the A/C goes off.
Tuesday, July 9th, 2024 AT 7:54 PM

17 Replies

Tiny
CANNON1349
  • MECHANIC
  • 609 POSTS
Hello,

This sounds like a Climate Control Head issue. The A/C should only come with the fan yes, but there may be a problem with the logic board or memory in the unit. There could potentially be an issue with the controls, but it is hard to rule out. Do you have a scan tool of any kind? I would scan the CAN system for any codes, we would be looking for body codes or climate control module codes stored in the memory. Please see our guide below on scanning the CAN system.

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Hope this helps,
William
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Wednesday, July 10th, 2024 AT 4:37 PM
Tiny
SHERILYN FRANKLIN
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Thank you!
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Wednesday, July 10th, 2024 AT 5:02 PM
Tiny
SHERILYN FRANKLIN
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That scanner is out of my price range, can you suggest a least expensive scanner?
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Wednesday, July 10th, 2024 AT 8:24 PM
Tiny
CANNON1349
  • MECHANIC
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Hi,

To read body codes / HVAC module codes, you may need a better scanner. I found a scanner on Amazon that may do the trick:

https://www.amazon.com/Creader-CRP123-Transmission-Automotive-Diagnostic/dp/B01HNO5PLY/ref=asc_df_B01HNO5PLY/?tag=hyprod-20&linkCode=df0&hvadid=692875362841&hvpos=&hvnetw=g&hvrand=16547413944348374471&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9009598&hvtargid=pla-2281435178618&psc=1&mcid=9c6d5a2ccafa36e7b4a34ee05543312a&hvocijid=16547413944348374471-B01HNO5PLY-&hvexpln=73&gad_source=1

You may also need to search for scanners that can read "U" codes. This scanner I found is just an example. Otherwise, you can stop by any autoparts store and their scanner should be able to read it for you.

Thanks,
William
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Friday, July 12th, 2024 AT 7:08 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
Why does my radiator warning light come on when its full of antifreeze? When I turn my car off and back on it goes off, it seems to come on intermittently.
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Saturday, July 13th, 2024 AT 1:06 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
Did you see my new question?
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Monday, July 15th, 2024 AT 9:27 AM
Tiny
CANNON1349
  • MECHANIC
  • 609 POSTS
Hello,

Sorry for the delay. I am not familiar with a "radiator warning" light, can you send us a photo or description of what you mean? If it's regarding coolant level, make sure you have the right amount of coolant, and if you do, the sensor could have an issue. There also may be a light for coolant temperature, some cars it shows up as blue on startup, and once the car is warmed up enough it will turn off.

Let us know,
William
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Monday, July 15th, 2024 AT 3:57 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
Can you send me a pic of where the radiator plug is located? The video doesn't let me see where is, I'm going to flush and fill my radiator but I can't find the plug.
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Monday, July 15th, 2024 AT 9:34 PM
Tiny
CANNON1349
  • MECHANIC
  • 609 POSTS
Hello,

According to the diagram, it looks like the drain is on the passenger side of the radiator and will require a flathead screwdriver type tool to unscrew out. I attached a photo from the repair procedure, nothing should be in the way of you getting the screw out.

Hope this helps,
William
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Tuesday, July 16th, 2024 AT 7:30 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
I saw this pic already I'll try to find it tomorrow.
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Tuesday, July 16th, 2024 AT 8:42 PM
Tiny
KEN L
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Any luck?
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Thursday, July 18th, 2024 AT 10:51 AM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
I "think" I may have found it, I will look again tommorrow.
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Thursday, July 18th, 2024 AT 6:50 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
Is it on the drivers side?
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Thursday, July 18th, 2024 AT 6:51 PM
Tiny
CANNON1349
  • MECHANIC
  • 609 POSTS
Hi,

There should be a protrusion from the radiator facing towards the wheel. Not towards the engine. From the diagram I have it looks like it may be on the passenger side.

William
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Thursday, July 18th, 2024 AT 6:56 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
Okay, I'll take a look tomorrow.
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Thursday, July 18th, 2024 AT 7:07 PM
Tiny
SHERILYN FRANKLIN
  • MEMBER
  • 59 POSTS
This is what mine looks like also a picture underneath it. It looks nothing like the pic u sent there is nothing on it where I can unscrew a plug
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Sunday, July 21st, 2024 AT 10:01 PM

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