Question about 2005 Ford F-150

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The air conditioner wont work and it gets hot during the day but the air cooler wont budge to make it cool, it only works if you go about 65 miles per hour but when it sits, it wont work

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It sounds first like you are in need of air condition freon or 134 a. Determine which system you have by looking under the hood for a small sticker designating which. Next, if you have a 134 system, you can essentially service it yourself by purchasing a fill kit at any local auto parts store. Next, Attach the hoses as described in the refill kit(I do recomend ones with stop-leak in them as I have used this many times in the past. The fill kits will have guages that tell you how much to fill them according to the ambient temp, or outside temperature. Start filling by with the can upside down and check the pressure readings often. It is very easy to overfill new systems. Just closely follow the directions on the package. Your vehicle a/c functions at higher temperatures because the compressor is running at a higher RPM as is your engine. Also, check with the part store if your vehicle has an internal filtration system. If it does, they usually are fairly easy to change and will probably help tremendously. Good Luck, Dave

Posted on Aug 01, 2009

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You might need more refrigerant, because what it sounds like is happening, is theres a very low supply of refrigerant, and after going fast, the a/c motor starts working very fast, and dere fore is circulating fast enough to get a little bit of cold air. but its just a theory, and if its right, u need more refrigerant, which you could get at da auto parts, for like tops, 30. goodluck

Posted on Aug 01, 2009


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