# A/C- blows warm air on the drivers side and cold on passanger side

**URL:** <https://community.cartalk.com/t/a-c-blows-warm-air-on-the-drivers-side-and-cold-on-passanger-side/3694>\
**Category:** Maintenance/Repairs\
**Tags:** airconditioning\
**Created:** [August 26, 2007, 5:29pm UTC](https://community.cartalk.com/t/a-c-blows-warm-air-on-the-drivers-side-and-cold-on-passanger-side/3694 "2007-08-26T17:29:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Rolli1098](https://avatars.discourse-cdn.com/v4/letter/r/22d042/32.png) [@Rolli1098](https://community.cartalk.com/u/Rolli1098)\
**Post date:** [August 26, 2007, 5:29pm UTC](https://community.cartalk.com/t/a-c-blows-warm-air-on-the-drivers-side-and-cold-on-passanger-side/3694/1 "2007-08-26T17:29:54Z")

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The a/c in my '03 mercury moutaineer blows warm air on the drivers side vents, but cold air on passenger side. The dual center vents are half warm and half cold. Is a duct or vent stuck?

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**Author:** ![Roadrunner](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@Roadrunner](https://community.cartalk.com/u/Roadrunner)\
**Post date:** [August 26, 2007, 5:35pm UTC](https://community.cartalk.com/t/a-c-blows-warm-air-on-the-drivers-side-and-cold-on-passanger-side/3694/2 "2007-08-26T17:35:57Z")

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Quite likely.

Maybe a disconnected or stuck blend duct door.

Are your heating/a/c controls vacuum operated or linkage?

If vacuum, make sure there are no damaged or disconnected hoses.