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post #1 of 4 (permalink) Old 07-20-09, 08:51 AM Thread Starter
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2004 Navigator Air Conditioning Problem

Hi,

My Navigator air conditioning is acting up. I was driving yesterday with the air on. I had it set to come out of the main air vent in the front of the dash. All of a sudden the air stops blowing out of those vents and just switches to the defogger vents even though I still had it set on the other setting. But I noticed that when I come to a stop at a stop sign or stop light, it will start working normal again. It will only act up when I accelerate. I have no clue why it is doing this. Any help would be appreciated. The car has about 98,000 miles on it. Thanks.

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post #2 of 4 (permalink) Old 07-20-09, 05:16 PM Thread Starter
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Re: 2004 Navigator Air Conditioning Problem

Does anyone have any suggestions?
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post #3 of 4 (permalink) Old 07-20-09, 11:24 PM
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Re: 2004 Navigator Air Conditioning Problem

You are loosing vacuum to the a/c head. Check the black vacuum hose going to the a/c head. It runs through the firewall to the engine. I think the line tees into another one in the engine bay.The a/c head itself is a possibility as well.

FYI- (simply put) vacuum goes away when the throttle is opened and is created when it is closed.

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post #4 of 4 (permalink) Old 07-21-09, 05:07 PM Thread Starter
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Re: 2004 Navigator Air Conditioning Problem

Thank you. LOL thank you for putting it a little more simple. I couldnt think of a good way to word it. Thanks
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