Why does my AC stop blowing air when I accelerate?
Why does my AC stop blowing air when I accelerate? Typically this occurs due to a bad vacuum check valve under the hood. During hard acceleration the AC door system loses vacuum, causing the doors to default to the windshield. This check valve keeps this from occurring. When does the a / C stop working in a Ford? Ford E-Series Questions - A/C quits working when engine is under load. - CarGurus A/C quits working when engine is under load. When accelerating, my A/C stops blowing and only sometimes resumes blowing when a fairly low speed is attained. At highway...