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Shaele1
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Posted: Oct 31 2019 at 12:33pm | IP Logged Quote Shaele1

Hoping someone has some insight..

My 2015 Frontier has started doing something strange. As it's nearing winter, I've been using the heat for the first time this week, and this is what's happening:

After starting the engine, and idling for a minute or two, I begin my drive to work, and set the temperature to about 25 Celsius to warm up the truck. Once the engine warms up I get the nice warm air blowing. There is no change in the temperature when idling (as some other posters on here experienced).

About 15-20 minutes into my drive to work, I can feel a noticeable shift in the temperature from the vents, and it starts blowing in coolish air. I have to set the temperature upwards of 30 degrees to get warm air blowing in again.

I checked the coolant level and it seemed to be correct, although I will top that up this evening.
Any other ideas what this could be? Anyone else experienced this?

Thanks,
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frontierguy
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Posted: Nov 03 2019 at 6:48pm | IP Logged Quote frontierguy

The most likely cause is slightly low coolant, the blue
coolant seems to "evaporate" for lack of a better term.
Set the overflow tank above the "HOT" line.

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Rubble
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Posted: Nov 05 2019 at 3:22am | IP Logged Quote Rubble

Shaele,

Be sure to check the coolant level in the Radiator as
well. Best when engine is overnight cold, 1st loosen
cap on the OverFlow Tank, then take the cap off the
radiator tank.

If radiator is low, I top up the radiator, put the cap
on and fill the overflow about 1/2" above full mark on
overflow tank, then put that cap back on.

I Recheck frequently to see if level remain's the same.

For information: There is a specific method for
changeing the coolant in the Nissan Service Manual.



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