# AC Only blows cold air when traveling at high speed

**URL:** <https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078>\
**Category:** Maintenance/Repairs\
**Tags:** nissan, versa\
**Created:** [July 30, 2020, 5:16pm UTC](https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078 "2020-07-30T17:16:43Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![erikjpflueger\_169563](https://avatars.discourse-cdn.com/v4/letter/e/c6cbf5/32.png) [@erikjpflueger\_169563](https://community.cartalk.com/u/erikjpflueger_169563)\
**Post date:** [July 30, 2020, 5:16pm UTC](https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078/1 "2020-07-30T17:16:43Z")

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AC blows hot air while idling and at speeds below 40ish mph. At higher speeds, highway driving, the AC blows cold air. While running a pressure diagnostic on the low pressure port, I noticed the compressor cycles on and off… when off, the pressure registers in the green, when on, it registers in the red/high.

No issues with engine temp, etc.

Looking to get some idea of what may be causing the issue before taking it in to the mechanic.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [July 30, 2020, 5:26pm UTC](https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078/2 "2020-07-30T17:26:44Z")

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The the electric fan when the AC is turned on. I suspect it is not running and it should be.

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**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\
**Post date:** [July 30, 2020, 5:28pm UTC](https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078/3 "2020-07-30T17:28:00Z")

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The condenser fan (behind the radiator) may not be operating properly. A qualified mechanic can quickly diagnose and repair this.

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [July 30, 2020, 8:50pm UTC](https://community.cartalk.com/t/ac-only-blows-cold-air-when-traveling-at-high-speed/168078/4 "2020-07-30T20:50:20Z")

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My guess (if the inside fan is running) - low freon.