Question about 1999 Jeep Grand Cherokee

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Cold air when the heater is on.

1999 Ltd left vents blows hot air but the right blows cold

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  • SurfnSnow Dec 28, 2008

    I Have the same problem. Is there a work around for this without spending days dismantalling the dash and hvac systems?

  • Anonymous Jan 05, 2009

    i had the same problem the was only hot on the driver side and cold on the passanger side, and the other day while driving my jeep the heater quit working and will not turn back on.

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The center blend housing on the heater/a/c assembly is probably broken.

Posted on Dec 10, 2008

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  • 7 Answers

SOURCE: 1999 Ltd. The right vents blow hot air but left vents blow cold

Yes go to you have to get the codes from your ATC controls first...Hold down the A/C button and the Recirculating button at the same time and while holding the two buttons turn you left temp. control up. It should give you codes if not then it will just read 00. Once you get those find out what they mean...20, 46,52,or 54 means you blend door(s) are stuck down and have to come up to allow heat to flow. Go to www.heatertreater.net and it will tell you how to replace it or in my case I just fixed it by putting a screw in it to hold the doors up....But hey i'm cheap so i like quick fixer uppers!!! Try that and lemme know if it works...

Posted on Dec 08, 2008

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The heater in my 1999 Land Rover Discovery Series 1 won't blow cold.


As per your problem mentioned.There are few solved help links to troubleshoot these problems.Go through the list and Click the link below:----
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2005 Chrysler PT Cruiser: A/C Blows Warm? http://whoisbyme.blogspot.in/2012/06/2005-chrysler-pt-cruiser-ac-blows-warm.html

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These will help.
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1 Answer

Left Vents blow warm/hot air when calling for cold air


Usually a sign of a faulty blend door under the dash.
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1999 Ltd. The right vents blow hot air but left vents blow cold


Yes go to you have to get the codes from your ATC controls first...Hold down the A/C button and the Recirculating button at the same time and while holding the two buttons turn you left temp. control up. It should give you codes if not then it will just read 00. Once you get those find out what they mean...20, 46,52,or 54 means you blend door(s) are stuck down and have to come up to allow heat to flow. Go to www.heatertreater.net and it will tell you how to replace it or in my case I just fixed it by putting a screw in it to hold the doors up....But hey i'm cheap so i like quick fixer uppers!!! Try that and lemme know if it works...

Dec 05, 2008 | 1999 Jeep Grand Cherokee

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