# 2010 Toyota Corolla - AC feels cool when switch isn’t on

**URL:** <https://community.cartalk.com/t/2010-toyota-corolla-ac-feels-cool-when-switch-isn-t-on/141526>\
**Category:** Maintenance/Repairs\
**Tags:** corolla, toyota\
**Created:** [June 4, 2019, 6:26am UTC](https://community.cartalk.com/t/2010-toyota-corolla-ac-feels-cool-when-switch-isn-t-on/141526 "2019-06-04T06:26:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Sunday](https://avatars.discourse-cdn.com/v4/letter/s/3e96dc/32.png) [@Sunday](https://community.cartalk.com/u/Sunday)\
**Post date:** [June 4, 2019, 6:26am UTC](https://community.cartalk.com/t/2010-toyota-corolla-ac-feels-cool-when-switch-isn-t-on/141526/1 "2019-06-04T06:26:32Z")

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Why is my car ac fan is cool without climate control switch on

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**Author:** ![COROLLAGUY1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/corollaguy1/32/7575_2.png) [@COROLLAGUY1](https://community.cartalk.com/u/COROLLAGUY1)\
**Post date:** [June 4, 2019, 2:30pm UTC](https://community.cartalk.com/t/2010-toyota-corolla-ac-feels-cool-when-switch-isn-t-on/141526/2 "2019-06-04T14:30:23Z")

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I have a 2012…same generation. Just make sure the a/c button is off when driving.Could be that the outside temperature was cool that day…my guess!.

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**Author:** ![MarcoPolo1](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@MarcoPolo1](https://community.cartalk.com/u/MarcoPolo1)\
**Post date:** [June 4, 2019, 3:28pm UTC](https://community.cartalk.com/t/2010-toyota-corolla-ac-feels-cool-when-switch-isn-t-on/141526/3 "2019-06-04T15:28:05Z")

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If you’re running the windshield defrost (edit: windshield zone setting), it will use AC whether the “AC” button is depressed or not. You could have a stuck/partially stuck compressor clutch or clutch relay. Somehow the “activation” wire (probably a negative/ground trigger), could be damaged and touching chassis ground, or the climate control panel could be faulty. Then there’s the possibility of gremlins… Seriously, I think I outlined every possible cause. You can tell of your compressor is running by watching to see if it’s spinning (which it shouldn’t be of it’s off).