# Heater blows cold air at idle - 2005 Buick LeSabre

**URL:** <https://community.cartalk.com/t/heater-blows-cold-air-at-idle-2005-buick-lesabre/134917>\
**Category:** Maintenance/Repairs\
**Tags:** lesabre, buick\
**Created:** [February 18, 2019, 9:09pm UTC](https://community.cartalk.com/t/heater-blows-cold-air-at-idle-2005-buick-lesabre/134917 "2019-02-18T21:09:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![craigshaw](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@craigshaw](https://community.cartalk.com/u/craigshaw)\
**Post date:** [February 18, 2019, 9:09pm UTC](https://community.cartalk.com/t/heater-blows-cold-air-at-idle-2005-buick-lesabre/134917/1 "2019-02-18T21:09:25Z")

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my heater only blows cold air when idleing

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [February 19, 2019, 2:11am UTC](https://community.cartalk.com/t/heater-blows-cold-air-at-idle-2005-buick-lesabre/134917/2 "2019-02-19T02:11:46Z")

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Is your coolant level correct . . . ?!

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**Author:** ![FRANKM](https://avatars.discourse-cdn.com/v4/letter/f/2bfe46/32.png) [@FRANKM](https://community.cartalk.com/u/FRANKM)\
**Post date:** [February 19, 2019, 2:57pm UTC](https://community.cartalk.com/t/heater-blows-cold-air-at-idle-2005-buick-lesabre/134917/3 "2019-02-19T14:57:46Z")

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RE: db4690’s remark  
I agree. You may have air trapped in the heating system. Have you drained and refilled the cooling system lately? Changed the thermostat? Also a possibility is the heater control door may not be operating properly. Listen for an air leak under the dash on the passenger side.  
Good luck with your search.