Question about 2000 Jeep Grand Cherokee

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'04 Jeep Grand Cherokee: Heats...but only through defrost vents.

I can get lots of heat blowing out, but no matter where the selection dial is set, it only blows out the defrost/windshield vents. Heat can be felt, some, at the mid-level vents, but not really blowing out, and nothing coming out of the floor/feet vents.

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  • richard_muno Mar 05, 2009

    I can get lots of heat blowing out, but no matter where the selection dial is set, it only blows out the defrost/windshield vents. Heat can be felt, some, at the mid-level vents, but not really blowing out, and nothing coming out of the floor/feet vents.

  • Big A's Auto Repair
    Big A's Auto Repair May 10, 2014

    Hey Richard, This year model Jeep was bad about breaking A/C doors which will cause the problem you are describing. Here's a way to check the doors, switch each door while listening very carefully for the door operation. For instance, switch it from hot to cold and feel for temperature change, switch to recirc mode and listen fro the air flow to get louder, switch to floor mode to see if it goes to the floor and so on. The most common door that breaks on these is the recirc and when the happens you lose air floor through the other vents. But after pulling the A/C box out your obviously going to check all the doors anyway. Let me know how it goes and have a great day.

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Look for a vacuum leak to the heater contols,most likly a hose fell off at the intake manifold area.I bet the engine is running a little fast also.

Posted on Jan 16, 2009

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Check the control cable that operates the diverter door in the heater box at both ends, to make sure that it operates the door when you move the control lever.

Posted on Jan 15, 2009

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