Ok, the most common problem is a sticking water cut valve. Check your coolant level. Warm up the truck and turn the heat on. Grab hold of the hoses on both sides of the water cut valve in the picture. If the hoses are cold or just warm no coolant is flowing threw the valve. This means no coolant will flow threw the heater core.
replaced the water cut valve. It comes with the heater inlet hose.
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The coolant level is at max, and the hoses get hot when i turn the heat on but the air is not hot enough just a little bit more than warm
OK I have looked high and low and contacted college's at a few Nissan dealers they all tell me If you replace the water cut valve you will have heat again.
Try this and let me know how you make out.
sorry for the late reply.
so I'll just have to replace the water cut valve? Had been reading on related nissan titan problem regarding same problem and they say that IF BOTH THE HOSES ON BOTH SIDES OF THE VALVE BECOMES HOT THEN THE VALVE IS JUST FINE. AND THEY SAY THAT THE PROBLEM IS ON THE MECHANISM (FORGOT THE NAME) INSIDE THE DASHBOARD WHICH WILL BE HARD TO DO.
Please enlighten me more about this. Thanks again!
I have seen issue with the Air mix doors on the auto systems failing but not on the manual heater controls.
Try this, Have your blower on high and select from full cold to full heat. Do you feel and change is the air flow? If you do then the Mix door is functioning.
Let me know?
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