# 2013 RAM 1500 air speed changes on its own

**URL:** <https://community.cartalk.com/t/2013-ram-1500-air-speed-changes-on-its-own/142662>\
**Category:** Maintenance/Repairs\
**Tags:** ram\
**Created:** [June 20, 2019, 7:31pm UTC](https://community.cartalk.com/t/2013-ram-1500-air-speed-changes-on-its-own/142662 "2019-06-20T19:31:55Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Michael53](https://avatars.discourse-cdn.com/v4/letter/m/8797f3/32.png) [@Michael53](https://community.cartalk.com/u/Michael53)\
**Post date:** [June 20, 2019, 7:31pm UTC](https://community.cartalk.com/t/2013-ram-1500-air-speed-changes-on-its-own/142662/1 "2019-06-20T19:31:55Z")

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my air speed on the ac/heat changes on it its own. it does not always match up to the air speed on the control.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [June 20, 2019, 8:25pm UTC](https://community.cartalk.com/t/2013-ram-1500-air-speed-changes-on-its-own/142662/2 "2019-06-20T20:25:07Z")

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Chances are it’s the resistor, cheap and easy fix. If set on high and works okay, then I would try replacing the resistor. If variable when set on high then might be the blower motor, further diagnosis required.

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**Author:** ![Michael53](https://avatars.discourse-cdn.com/v4/letter/m/8797f3/32.png) [@Michael53](https://community.cartalk.com/u/Michael53)\
**Post date:** [June 20, 2019, 9:58pm UTC](https://community.cartalk.com/t/2013-ram-1500-air-speed-changes-on-its-own/142662/3 "2019-06-20T21:58:47Z")

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I’ve replaced the resistor. No change.  
I’ve replaced the blower motor. No change.  
It blows and changes speed on its own. If I hit a bump sometimes it will change speed.