# 2014 Lexus ES 350 temp settings change randomly

**URL:** <https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625>\
**Category:** Maintenance/Repairs\
**Tags:** lexus, es350\
**Created:** [November 12, 2019, 2:18am UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625 "2019-11-12T02:18:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ellis47](https://avatars.discourse-cdn.com/v4/letter/e/258eb7/32.png) [@Ellis47](https://community.cartalk.com/u/Ellis47)\
**Post date:** [November 12, 2019, 2:18am UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625/1 "2019-11-12T02:18:50Z")

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Purchased used w/19,800 miles. The temperature settings randomly change, both up and down, drivers side & passenger side. It is not the dual setting mode. Lexus wants $175 for diagnosis even though there is some warranty left. Any ideas?

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [November 12, 2019, 2:34am UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625/2 "2019-11-12T02:34:44Z")

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Not sure what warranty you think is still left. The Lexus warranty is for 48 months or 50000 miles. So all that is left is the emissions and drive line .  
That diagnostic fee is high but this is a luxury vehicle so not out of line . You did not say how long you have had this or where you purchased it from. If a dealer you might call and request some help with the repair .

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**Author:** ![It\_s-Me](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/it_s-me/32/12660_2.png) [@It\_s-Me](https://community.cartalk.com/u/It_s-Me)\
**Post date:** [November 12, 2019, 6:23am UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625/3 "2019-11-12T06:23:55Z")

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Randomly changes while driving?

Or the next time you start the car, they have changed from previous setting ? Could be dirty battery connections or a battery that is on it’s last leg, causing major voltage drop when starting engine.

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**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\
**Post date:** [November 12, 2019, 2:15pm UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625/4 "2019-11-12T14:15:21Z")

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> [@VOLVO\_V70](#):
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> The Lexus warranty is for 48 months or 50000 miles. So all that is left is the emissions and drive line .

If it was a CPO car the warranty could be extended by as many as 6 years.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [November 12, 2019, 2:33pm UTC](https://community.cartalk.com/t/2014-lexus-es-350-temp-settings-change-randomly/152625/5 "2019-11-12T14:33:23Z")

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> [@It\_s\_Me](#):
>
> Could be dirty battery connections or a battery that is on it’s last leg, causing major voltage drop when starting engine.

Or, it could be a symptom of a failing alternator.