# 2015 Nissan Frontier - Heat is weak

**URL:** <https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767>\
**Category:** Maintenance/Repairs\
**Tags:** nissan\
**Created:** [January 11, 2022, 12:14am UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767 "2022-01-11T00:14:25Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![whitedove1](https://avatars.discourse-cdn.com/v4/letter/w/ee59a6/32.png) [@whitedove1](https://community.cartalk.com/u/whitedove1)\
**Post date:** [January 11, 2022, 12:14am UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767/1 "2022-01-11T00:14:25Z")

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Heat don’t work if going down highway heat will come out but in city driving no heat just luke warm air.

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**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\
**Post date:** [January 11, 2022, 12:26am UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767/2 "2022-01-11T00:26:00Z")

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I am guessing you are asking a question and not just letting us know.  
check the coolant level when engine is cooled down. if it is low, you might have a leak that needs to be addressed. add coolant to proper level and have it checked out by a reliable mechanic. if it is at the proper level you might have air in the system that needs to be bled out.  
now if you were just venting… then I am sorry to hear you are going to have a very cold winter driving.

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**Author:** ![tcmichnorth](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tcmichnorth/32/25126_2.png) [@tcmichnorth](https://community.cartalk.com/u/tcmichnorth)\
**Post date:** [January 12, 2022, 4:37pm UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767/3 "2022-01-12T16:37:12Z")

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Other possibilities are:  
1: faulty thermostat  
2: restricted heater core or  
3: malfunctioning blend door or actuator

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**Author:** ![whitedove1](https://avatars.discourse-cdn.com/v4/letter/w/ee59a6/32.png) [@whitedove1](https://community.cartalk.com/u/whitedove1)\
**Post date:** [January 12, 2022, 5:07pm UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767/4 "2022-01-12T17:07:57Z")

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Thank you having it check out on Friday

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**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\
**Post date:** [January 12, 2022, 7:20pm UTC](https://community.cartalk.com/t/2015-nissan-frontier-heat-is-weak/181767/5 "2022-01-12T19:20:15Z")

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Make sure the fan is running. Had not much cold air at stop lights, but fine on the highway. Turned out the fan was not working and a replacement variable resister fixed it.