Bunchof7 Posted January 9, 2018 So I have a 2013 Nissan NV3500 took to the dealer & they said its the heater core. So they told me to look at my warranty when I get home so I did & called them & they said they would replace if its not plugged. So I called back the dealer & service had no clue & got back to me & said its clogged after I told her they will cover if not clogged. So if its clogged why is the front working. They claimed the last family they tore apart & found a toy in it & it wasn't covered so they are guessing its a toy. SO I ask her well where should i watch & look so no more toys get in there & she said she doesn't know??Also never gave me any paperwork either. Quote Share this post Link to post Share on other sites
Mark Rogers Posted January 9, 2018 That sounds weird. How could a toy get into the heater core? Maybe if the cover was broken on the air return vent in the back, then a toy could get inside the duct. Otherwise, that sounds fishy to me. The return vent is on the driver's side, between the 4th row and the rear doors. Take a look to make sure the plastic panel covering it is intact. Anything bigger than confetti would have a hard time fitting through it. I have heard hair, dust, etc. getting sucked up in there and clogging the fan. But you're still getting air flow. I bet the problem is with a thermostat that controls the flow of hot engine coolant to the heater core. You can read about a similar issue in this thread: http://nissannvforum.com/topic/426-need-help-with-rear-ac/ 1 andy_george reacted to this Quote Share this post Link to post Share on other sites
Mark Rogers Posted February 10, 2018 Doh! Looks like I was wrong about the location of the air return vent. I did some experimentation and found that it's to the left of the second row. So, does anyone know what that grill by the back left door is for? Quote Share this post Link to post Share on other sites
