I was Going to advise Nissan owners . The coolant system is very sensitive to air. You get an air pocket what so ever in all Nissan's , you can have a few symptoms ,
1 no heat
2 no heat at idle , but heat when moving
3 over heating.
Check coolant systems and have them Bleed out. Nissan recommend lifting the front of the vech , so the radiator cap is at its highest point so Air can be released. If any one has a question about it, feel free to ask me.. GL all