# Fan Switch on the Fritz

**URL:** <https://community.cartalk.com/t/fan-switch-on-the-fritz/11206>\
**Category:** Maintenance/Repairs\
**Tags:** fans\
**Created:** [February 27, 2008, 6:53pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206 "2008-02-27T18:53:36Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![tomstruck](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@tomstruck](https://community.cartalk.com/u/tomstruck)\
**Post date:** [February 27, 2008, 6:53pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/1 "2008-02-27T18:53:36Z")

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I have a 05 Dodge 2500. When I go to turn on the A/C the fan only works in the highest setting. What happened to this part?

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [February 27, 2008, 6:54pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/2 "2008-02-27T18:54:45Z")

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Probably nothing. It’s most likely the resistor block.

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**Author:** ![tomstruck](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@tomstruck](https://community.cartalk.com/u/tomstruck)\
**Post date:** [February 27, 2008, 7:03pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/3 "2008-02-27T19:03:56Z")

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So How would I repair it?

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [February 27, 2008, 7:54pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/4 "2008-02-27T19:54:06Z")

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While I don’t know the specifics for your truck, this is usually a very simple job. The resistor block will be sticking into the HVAC airbox under the dash or possibly under the hood. It will be held in with 2 fasteners and have a 4- or 5 wire electrical connector. If you buy the replacement, just look for the matching part on your truck.

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**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\
**Post date:** [February 27, 2008, 10:56pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/5 "2008-02-27T22:56:36Z")

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Haynes manuals identify the resistor block locations.

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**Author:** ![tomstruck](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@tomstruck](https://community.cartalk.com/u/tomstruck)\
**Post date:** [February 29, 2008, 11:51pm UTC](https://community.cartalk.com/t/fan-switch-on-the-fritz/11206/6 "2008-02-29T23:51:03Z")

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Well, I was looking for the resistor under the glove compartment and I find a plug disconnected. I plug it in and my fan works! If you did not tell me where to look I would not have found the disconnected plug and would have paid the dealer two hundred bucks to find the problem. Thanks!