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Archive Home > 2008 > June > 29 > How could accelerating affect A/C?

How could accelerating affect A/C?

By Mike Allen / The Bulletin
June 29, 2008

Dear Mike: When I accelerate, the air conditioner stops blowing through the vents. When I brake or simply coast, the air starts to blow again.

What’s going on here?

A: Many cars use engine vacuum to operate the blend-air doors in the underdash plenum. These doors control the air....

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