# AC Problem with Lincoln LS

**URL:** <https://community.cartalk.com/t/ac-problem-with-lincoln-ls/45413>\
**Category:** Maintenance/Repairs\
**Tags:** ls, airconditioning, lincoln\
**Created:** [March 2, 2010, 6:02pm UTC](https://community.cartalk.com/t/ac-problem-with-lincoln-ls/45413 "2010-03-02T18:02:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![janbobwagner](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@janbobwagner](https://community.cartalk.com/u/janbobwagner)\
**Post date:** [March 2, 2010, 6:02pm UTC](https://community.cartalk.com/t/ac-problem-with-lincoln-ls/45413/1 "2010-03-02T18:02:30Z")

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I have a 2000 Lincoln LS, V8, and I have an intermittent problem in the summer with the AC. Two dealers and an independent mechanic could not figure it out. After a period of time when running the AC, heat comes out of the passenger side air vent and AC out of the driver side air vent. Eventually, if I run it long enough, the driver’s side air vent will also produce heat. This usually occurs on a very hot day. I do not have a problem with the heat during the winter. I know this is a persistent problem with the LS because I have seen the dialogue on the web, but I have not come across anyone who has solved it. Any thoughts?

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**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\
**Post date:** [March 2, 2010, 6:22pm UTC](https://community.cartalk.com/t/ac-problem-with-lincoln-ls/45413/2 "2010-03-02T18:22:57Z")

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It’s a common problem, and is easily solved. You need to replace your DCCV (Dual Coolant Control Valve). It’s about a $150 part, should be around $300 if you have someone replace it. The coolant should be flushed too, unless you have done so in the last three years or less.