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Hi, and thank you for taking the time to read this article, as I try to resolve the problem, I will seek help from anyone that will offer it. NOTE: I continue to go the dealerships and complain of not having any heat. To date, nothing has been actually done to fix the problem except a heater core flush. Nissan customer service and the dealerships will not admit any issue exists, and i have no leads on what to do next.

I have a 2015 Pathfinder Platinum with 70,000 km’s (under 45,000 miles). I live in Eastern Ontario, Canada where winter temperatures will get to -35 C (or -45 with the wind-chill). That’s -31 to -50 degrees Fahrenheit.

So to the problem then..

The temperature of the heat while accelerating is kinda warm, it gets to a balmy 55 degrees Celsius (130 F.) which seems like it would be hot, but it really isn’t. For example, my dad’s 2012 Buick gets to 88 degrees Celsius (190 F.) again.. It’s just air, so it’s not burning hot.

The heat temperature is not any better in the summer either, so it’s not a question of “it can’t keep up in winter”.



My first question is this: can anyone with a 2015 take readings of the temperature of the heat at the vents using a digital meat thermometer, this must be taken while under acceleration, at full hot, full fan speed.

Part 2 question: Does the temperature of the air steadily decrease while at idle.

**Please don’t use a heat gun to check temperature of the air.. that won’t work.

Question 3: the engine temperature gauge on the dashboard; Can someone please tell me how high the needle gets. Mine never makes it to hallway, it gets only about 3/8’s of the way up.

I’d love to know if any mechanics out there can tell me straight up what the problem is.

Cheers, and thank you in advance.
 

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I have a 2010 Pathfinder. I had the same issue...it was the internal transmission cooler that went bad, ended up destroying my transmission. Had to rebuild and have an external transmission cooler put on. Hope you figure it out
 

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2013's didn't have the cooler failure issues like some of the R51 Pathfinders had, so that's good news! I haven't worked on any R52's, yet, but the average "max" heater vent temps I've measured in Nissans in the past is around 140 degrees F. A lot of later Nissans (2002+) tend to have issues with trapping air in the heater core. This is the method I use to purge it. First, make sure the coolant is topped off and, at least on the R51 and likely on the R52, as well, make sure the radiator and coolant reservoir caps are on the right tank! Again, I can't speak for the R52, but on the R51, the cap with the spring on it (a.k.a. the "vent" cap) is on the reservoir, not the radiator. The cap on the radiator only has a seal under it. Raise the front end of the vehicle as high as safely possible; you can jack it up and put it on jack stands, park it on a steep incline with the nose on the high side or drive the front wheels onto a set of car ramps. Start the engine and turn the front and rear (if equipped) heaters on and to the hottest settings. Run the engine at 2000-3000 RPM for at least 10-minutes, or longer, as necessary, until hot air comes out of the vents (approx. 140 F.). When done, you can lower the car and shut it off. When cold, check the coolant level and top off as necessary. Outside of changing the thermostat, that's all I can recommend.
 

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Hi, and thank you for taking the time to read this article, as I try to resolve the problem, I will seek help from anyone that will offer it. NOTE: I continue to go the dealerships and complain of not having any heat. To date, nothing has been actually done to fix the problem except a heater core flush. Nissan customer service and the dealerships will not admit any issue exists, and i have no leads on what to do next.

I have a 2015 Pathfinder Platinum with 70,000 km’s (under 45,000 miles). I live in Eastern Ontario, Canada where winter temperatures will get to -35 C (or -45 with the wind-chill). That’s -31 to -50 degrees Fahrenheit.

So to the problem then..

The temperature of the heat while accelerating is kinda warm, it gets to a balmy 55 degrees Celsius (130 F.) which seems like it would be hot, but it really isn’t. For example, my dad’s 2012 Buick gets to 88 degrees Celsius (190 F.) again.. It’s just air, so it’s not burning hot.

The heat temperature is not any better in the summer either, so it’s not a question of “it can’t keep up in winter”.



My first question is this: can anyone with a 2015 take readings of the temperature of the heat at the vents using a digital meat thermometer, this must be taken while under acceleration, at full hot, full fan speed.

Part 2 question: Does the temperature of the air steadily decrease while at idle.

**Please don’t use a heat gun to check temperature of the air.. that won’t work.

Question 3: the engine temperature gauge on the dashboard; Can someone please tell me how high the needle gets. Mine never makes it to hallway, it gets only about 3/8’s of the way up.

I’d love to know if any mechanics out there can tell me straight up what the problem is.

Cheers, and thank you in advance.
I have the same concern. 125-140f while driving when hot. It will drop to 90f at idle anytime the amb temp is below 25f. Now the lower heater hose to the heater core is hot and the upper is ice cold when that is happening, leading me to believe that the heater core is clogged. But I have had it to Nissan about 5 or six times and they keep telling me everything is ok.
 
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