# 1993 s10 a/c

**URL:** <https://community.cartalk.com/t/1993-s10-a-c/62869>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, s-10\
**Created:** [March 22, 2011, 2:09am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869 "2011-03-22T02:09:59Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![vincent52100](https://avatars.discourse-cdn.com/v4/letter/v/c68b51/32.png) [@vincent52100](https://community.cartalk.com/u/vincent52100)\
**Post date:** [March 22, 2011, 2:09am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/1 "2011-03-22T02:09:59Z")

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I have a wierd problem with the A/C on my 93 S10. It will start blowing warm air but if I accelerate real hard it will start blowing cold again. Any ideas? Thanks

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**Author:** ![SteveF](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/stevef/32/2_2.png) [@SteveF](https://community.cartalk.com/u/SteveF)\
**Post date:** [March 22, 2011, 2:49am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/2 "2011-03-22T02:49:34Z")

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Loose fan belt? Low refrigerant level? Any A/C shop will gladly check both items for you.

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**Author:** ![vincent52100](https://avatars.discourse-cdn.com/v4/letter/v/c68b51/32.png) [@vincent52100](https://community.cartalk.com/u/vincent52100)\
**Post date:** [March 22, 2011, 2:59am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/3 "2011-03-22T02:59:53Z")

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Hi. Fan belt is tight. Had ref level ck’d and it was supposedly ok.

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**Author:** ![MTraveler](https://avatars.discourse-cdn.com/v4/letter/m/ccd318/32.png) [@MTraveler](https://community.cartalk.com/u/MTraveler)\
**Post date:** [March 22, 2011, 11:24am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/4 "2011-03-22T11:24:33Z")

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First you should find out if the refrigerant is definitely OK. Have a shop check the compressor. Does the compressor kick in? If everything ‘under the hood’ is OK then it is probably a problem with the damper controls.

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**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:** [March 22, 2011, 1:07pm UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/5 "2011-03-22T13:07:13Z")

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If the HVAC system under that dashboard is vacuum controlled, what you describe will happen. As you open the throttle the vacuum decreases, and the temperature blend door may be moving when it shouldn’t.

Check for vacuum leaks.

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**Author:** ![vincent52100](https://avatars.discourse-cdn.com/v4/letter/v/c68b51/32.png) [@vincent52100](https://community.cartalk.com/u/vincent52100)\
**Post date:** [March 25, 2011, 12:14am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/6 "2011-03-25T00:14:22Z")

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Thanks, will check everything.

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**Author:** ![EllyEllis](https://avatars.discourse-cdn.com/v4/letter/e/f14d63/32.png) [@EllyEllis](https://community.cartalk.com/u/EllyEllis)\
**Post date:** [March 25, 2011, 1:00am UTC](https://community.cartalk.com/t/1993-s10-a-c/62869/7 "2011-03-25T01:00:59Z")

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I y sounds like a Vacuum problem to me as mcparadice says.