# 2005 Chevrolet TrailBlazer - Half heat

**URL:** <https://community.cartalk.com/t/2005-chevrolet-trailblazer-half-heat/162030>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet\
**Created:** [March 29, 2020, 4:34am UTC](https://community.cartalk.com/t/2005-chevrolet-trailblazer-half-heat/162030 "2020-03-29T04:34:17Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Quadria](https://avatars.discourse-cdn.com/v4/letter/q/d2c977/32.png) [@Quadria](https://community.cartalk.com/u/Quadria)\
**Post date:** [March 29, 2020, 4:34am UTC](https://community.cartalk.com/t/2005-chevrolet-trailblazer-half-heat/162030/1 "2020-03-29T04:34:18Z")

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My heat and air conditioner only half way work when I’m driving; and sometimes when I turn my wheel, I hear a popping noise coming from under my car where my wheels are…

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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:** [March 29, 2020, 9:16pm UTC](https://community.cartalk.com/t/2005-chevrolet-trailblazer-half-heat/162030/2 "2020-03-29T21:16:05Z")

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Bad blend door actuator. It is under the dash and pops when it goes bad. They cost about $50 for the part but it can take a bit of labor hours to replace it depending on the car and actuator. Any auto repair shop should be able to fix this.