# Ac repair **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [November 11, 2012, 11:29pm UTC](https://community.cartalk.com/t/ac-repair/75472 "2012-11-11T23:29:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jwalker](https://avatars.discourse-cdn.com/v4/letter/j/9fc29f/32.png) [@Jwalker](https://community.cartalk.com/u/Jwalker)\ **Post date:** [November 11, 2012, 11:29pm UTC](https://community.cartalk.com/t/ac-repair/75472/1 "2012-11-11T23:29:47Z")
01 crown Victoria, ac was recharged but it doesn’t blow cold or hot air. When it is turned on, my car would make a very loud vacuum noise, thats embarrassing. The rpms go up, and if I’m at a stop light I have to hold the brake or the car would take off. Any help? ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [November 12, 2012, 1:12am UTC](https://community.cartalk.com/t/ac-repair/75472/2 "2012-11-12T01:12:24Z")
If the blend doors are vacuum controlled a failed line or component could be the problem. Can you pinpoint the source of the noise? ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [November 12, 2012, 5:02am UTC](https://community.cartalk.com/t/ac-repair/75472/3 "2012-11-12T05:02:10Z")
I’m with Barkydog. The vent doors on this car are operated by vacuum from the engine. With a large vacuum leak in the blend door system, the engine is getting a lot more air, and revving up similar to having your foot partially on the throttle. The A/C control system needs to be looked at and the leak repaired to fix this.