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This happend to mine, so Im guessing you have the same problem. Under the hood and in the back, along the firewall. Close to the top and middle you will see a vacuum tree. Check there for any of those lines having a tear or just came off. One of my hoses had dry rotted. An air leak there will cause your defrost to not work

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โˆ™ 2008-08-02 16:36:17
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Q: How do you fix the air defrost in a 1990 Ford Tempo?
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