2015 Rogue heater problem

On a 7 year old car, it might be air in the heater line or a clogged heater core

I have a 2012 Nissan rogue and had the same problem ordered a heater blower motor off the internet for about 30 bucks installed it in a couple of hours and my heat and AC started working great if you are somewhat of a mechanical person you should be able to Google a how-to video on how to install it because you have to remove the gas pedal and quite a bit of stuff underneath the steering wheel and is a little tricky to get in and out but if you have any mechanical ability and you can follow directions in a little patience will save you a lot of money