Moderator: volvite
Had the same symptoms with our 2011. Read this thread and some others, ended up simply adding about 1 qt of coolant and that did the trick. Before I could actually heard bubbling in the heater core at stoplights, which tipped me off. To fill I parked on an incline, added coolant to the radiator with the engine warm, and "pumped" the lower radiator hose to move the bubbles out. Worked like a charm.itstoodangcoluphere wrote:
I've read about air in the system but haven't tried anything with it yet.
Thanks for this. I'll take a look at it and see if it's something that I need to change as well. I live in Texas and summer is coming so there will be no shortage of heat until about late October-early November. Hell, sometimes Christmas is 80 degrees and sunny....YouKnowWho wrote:So I have been having this issue and a friend of mine had the same issue on his 2012 Titan. He had to have his "auxiliary water pump" replaced. I took my Pathfinder to the dealership (as it's certified pre-owned and still under warranty) and sure enough, auxiliary water pump is what sends warm coolant into your heating system at idle. This pump turns on when you don't have the engine revving high enough to pump (warm) coolant through the heating system. If the pump isn't working the engines heat will be normal and the heat through your vents will be intermittent or not working at all (depending on revs).
Unfortunately Nissan argues that this isn't covered under my Certified Pre-Owned warranty and they want to charge me $385 for the part and another $300 in labor. They claim that Nissan doesn't manufacture only the auxiliary water pump without the hoses it is connected to.
5 minutes of searching online and Cardone makes a replacement pump for this and it's only $108. They also have a video of how to replace it (the pump is on the very top of your engine bay in the back in a very accessible spot) by removing 2 screws and taking off 2 hose clamps. Here's a link of the part:
https://www.carid.com/cardone/water-pum ... plications
Hopefully this helps out a few of you guys out there. This is apparently a very well known problem with Nissan that obviously isn't something they're willing to help their customers out with.