Question about 1996 Ford Thunderbird LX

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Air conditioning blows out defrost when accelerator is depressed

The ac blows cold when idling but when i accelerate it blows out the defrost vent. i think it's a vaccum problem but i can't find the leak. It's on a 1996 ford thunderbird with a 4.6L V8.

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You need to open the vent, under the dash. Check the cable and moving action assembly. Make sure that it is all moving correctly. Some of the newer hvac systems in cars work off of vacume but most work with cables. Not big long cables, just small lever cables. also check your seals and make sure none of them are broken. I often find this is a bigger probel, the seal is cracked or broken or just came off and needs to be re glued in place. Don't be afraid to take the vent tubes apart as long as you can remember where they go.

Posted on May 31, 2009

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