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Stopping the A/C when in defrost/demist setting

 
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Old 25 Aug 2011, 11:31 am
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Red face Stopping the A/C when in defrost/demist setting

Hello everyone

I'm new here and wondered if anyone can help

I have a 2007 2.4 ltd cruiser that I bought 5 months ago and its great.
I'd like to stop it activating the air con when I set it to demist. Can this
Be done? Thanks
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Old 25 Aug 2011, 02:45 pm
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Default Re: Stopping the A/C when in defrost/demist setting

I know that it can be done on the 2001-2005 cruisers.

Quote:
Originally Posted by Cov_kid_uk View Post
Hello everyone

I'm new here and wondered if anyone can help

I have a 2007 2.4 ltd cruiser that I bought 5 months ago and its great.
I'd like to stop it activating the air con when I set it to demist. Can this
Be done? Thanks
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Old 25 Aug 2011, 03:45 pm
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Default Re: Stopping the A/C when in defrost/demist setting

im not sure what de-mist is??? but if it is the defog then i dont think you can the ac runs the defrosters
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Old 25 Aug 2011, 04:19 pm
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Red face Re: Stopping the A/C when in defrost/demist setting

My local dealer did mention something about the pre 2006 models having the option to stop it but nothing on the newer versions. Demist is the same as defog. When you set the air flow to screen only it activates the ac to dry the air but I just want the air flow to clear the screen. I can't even find a seperate fuse that operates it. If I use the ac to defog I need to keep ac on or it just fogs up when you turn it of. Any help much appreciated.
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Old 25 Aug 2011, 04:23 pm
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Default Re: Stopping the A/C when in defrost/demist setting

The AC is designed to run when the defroster is on. One of the things AC does is remove moisture...less moisture = less fog on windows. Most cars have done this since the 80's. AC does not run the defrosters, but it does greatly help them remove fog from the inside of the windows.

The 2006 and up have a lot of options on where air is directed. First is out the top dash vents only. Second is bot dash and floor vents. Third is floor only. Fourth is floor and defrost, and Fifth is defrost only. The controls can also be set in between any of these setting. I find the my feet get quite hot on long trips in the summer so I turn the control to give me a little AC from the floor vents.

Last edited by azphotog; 25 Aug 2011 at 04:24 pm. Reason: spelling
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Old 25 Aug 2011, 05:10 pm
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Default Re: Stopping the A/C when in defrost/demist setting

Thanks but I don't want the ac to defog the car just the blowers will do the job fine. This is the first car I've had that will turn the ac on when you change the air flow to the screen (defrost) vents. It clears the screen great but only as long as the ac is on and that eats fuel which is why I'm trying to deactivate it. Is this a standard feature on American cars? It's the first time I've had this in the uk.
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Old 25 Aug 2011, 09:17 pm
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Default Re: Stopping the A/C when in defrost/demist setting

Two links describing the modification for the first generation cruiser (both describing the same process). Because the control panel in your car is different, this is only to help you figure out yourself how it might be done on a 2007.

Let us all know if you figure it out.

Turning the AC compressor off during defrost mode?

PTCrew.com - Learn it or Burn it.

The picture below shows my 2004 control panel after the modification.
rockandroller likes this.

Last edited by sanatanadharma; 09 Nov 2016 at 09:59 am.
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Old 26 Aug 2011, 03:08 am
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Default Re: Stopping the A/C when in defrost/demist setting

Thanks sanatanadharma

I'll take a look this weekend and see what I find. Will let you know what happens. Finger's crossed they use the same switch control on mine.
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Old 26 Aug 2011, 09:33 am
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Default Re: Stopping the A/C when in defrost/demist setting

yes i do think it is a strandard feature on american cars and it works well
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