# AC Question

**URL:** <https://community.cartalk.com/t/ac-question/40456>\
**Category:** Maintenance/Repairs\
**Tags:** civic, honda\
**Created:** [December 7, 2009, 6:09pm UTC](https://community.cartalk.com/t/ac-question/40456 "2009-12-07T18:09:49Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![donprezact](https://avatars.discourse-cdn.com/v4/letter/d/b9e5f3/32.png) [@donprezact](https://community.cartalk.com/u/donprezact)\
**Post date:** [December 7, 2009, 6:09pm UTC](https://community.cartalk.com/t/ac-question/40456/1 "2009-12-07T18:09:49Z")

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Re: 2000 Honda Civic HX  
  
  
  
 Do the HVAC control algorithms use a different compressor duty cycle when in defrost mode, allowing the compressor to stay on all or most of the time (longer than the normal A/C mode) when the defrost mode is selected to remove moisture from the interior of the vehicle.

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<div class="post-metadata">

**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [December 8, 2009, 5:03pm UTC](https://community.cartalk.com/t/ac-question/40456/2 "2009-12-08T17:03:24Z")

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No. The compressor cycles on and off according to pressure within the AC system. It doesn’t matter whether you’re cooling or dehumidifying.