# GMC Terrain - AC fan runs while engine is off

**URL:** <https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994>\
**Category:** Maintenance/Repairs\
**Tags:** terrain, gmc\
**Created:** [May 28, 2020, 10:23pm UTC](https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994 "2020-05-28T22:23:21Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Eric-Nancy](https://avatars.discourse-cdn.com/v4/letter/e/cab0a1/32.png) [@Eric-Nancy](https://community.cartalk.com/u/Eric-Nancy)\
**Post date:** [May 28, 2020, 10:23pm UTC](https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994/1 "2020-05-28T22:23:21Z")

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I have a 2016 GMC. the fan on the AC comes on while engine is turned off

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**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\
**Post date:** [May 28, 2020, 11:42pm UTC](https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994/2 "2020-05-28T23:42:14Z")

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Are you sure it’s the AC fan? The cooling fan running after the engine is shut off is normal. I’ve never heard of that happening with the AC fan but I’d guess a bad ignition switch, maybe a faulty body control module.

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**Author:** ![Eric-Nancy](https://avatars.discourse-cdn.com/v4/letter/e/cab0a1/32.png) [@Eric-Nancy](https://community.cartalk.com/u/Eric-Nancy)\
**Post date:** [May 29, 2020, 12:05am UTC](https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994/3 "2020-05-29T00:05:40Z")

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Yes, absolutely! Went to dealer and they replaced the HVAC BLOWER RESISTER MOTOR. After $180 still have the same problem

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**Author:** ![davepsinbox\_157004](https://avatars.discourse-cdn.com/v4/letter/d/73ab20/32.png) [@davepsinbox\_157004](https://community.cartalk.com/u/davepsinbox_157004)\
**Post date:** [May 29, 2020, 12:11am UTC](https://community.cartalk.com/t/gmc-terrain-ac-fan-runs-while-engine-is-off/164994/4 "2020-05-29T00:11:03Z")

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Then go back to the dealer and tell their shop–nicely but firmly–that they haven’t fixed the problem and you want them to try again. $180 is a decent amount to spend and _not_ fix the problem.