# AC-heat control switch issues

**URL:** <https://community.cartalk.com/t/ac-heat-control-switch-issues/92112>\
**Category:** Maintenance/Repairs\
**Created:** [December 31, 2015, 4:33am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112 "2015-12-31T04:33:20Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![brm7675](https://avatars.discourse-cdn.com/v4/letter/b/3ec8ea/32.png) [@brm7675](https://community.cartalk.com/u/brm7675)\
**Post date:** [December 31, 2015, 4:33am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/1 "2015-12-31T04:33:20Z")

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I have a 2003 Impala LS with around 114,000 miles. I noticed today that the control switch that turns on the AC or heat is not fully working right. My switch has 5 levels, and on levels 1 and 2 nothing happens. But when I switch to levels 3-4 or 5 it works just fine.

My question is is fixing this going to involve removing the entire dash from the car? My guess it’s a contact issue, and figure it might be pricy to get repaired.

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [December 31, 2015, 4:40am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/2 "2015-12-31T04:40:50Z")

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Are you talking about the ventilation fan speed?

Tester

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**Author:** ![brm7675](https://avatars.discourse-cdn.com/v4/letter/b/3ec8ea/32.png) [@brm7675](https://community.cartalk.com/u/brm7675)\
**Post date:** [December 31, 2015, 6:23am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/3 "2015-12-31T06:23:10Z")

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Yes, that is it.

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**Author:** ![MY\_2\_CENTS](https://avatars.discourse-cdn.com/v4/letter/m/22d042/32.png) [@MY\_2\_CENTS](https://community.cartalk.com/u/MY_2_CENTS)\
**Post date:** [December 31, 2015, 6:24am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/4 "2015-12-31T06:24:38Z")

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Typical of a partially burned out blower motor resistor which is located in the blower housing. I can’t say for sure but it is probably pretty easy to get at. At least it is in the GM cars I’ve replaced it in.

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<div class="post-metadata">

**Author:** ![brm7675](https://avatars.discourse-cdn.com/v4/letter/b/3ec8ea/32.png) [@brm7675](https://community.cartalk.com/u/brm7675)\
**Post date:** [December 31, 2015, 6:53am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/5 "2015-12-31T06:53:03Z")

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Yes, that is it.

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**Author:** ![brm7675](https://avatars.discourse-cdn.com/v4/letter/b/3ec8ea/32.png) [@brm7675](https://community.cartalk.com/u/brm7675)\
**Post date:** [December 31, 2015, 6:54am UTC](https://community.cartalk.com/t/ac-heat-control-switch-issues/92112/6 "2015-12-31T06:54:43Z")

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How is a problem like this diagnosed to know what is causing the problem