Nissan Repair Questions? Ask a Mechanic for Answers ASAP
The heater valve coolant flow comes straight off the right cylinder head. There is nothing that would really prevent the engine side of the hose from warming, so i am thinking its probably warm if the engine is warm.
Now if the engine temp is not warming up normally, then your thermostat may be failed open causing it to never heat up.
I would say MANUALLY open the valve by hand after taking the cover off, but the 2010 has a revised water cut valve that works alot like a pintle or electric thermostat. so its not that easy.
you could temporarily bypass it all together though if you wanted to try that. You would just need a union.
if the engine temp gauge reads normal then the thermostat is closing and opening normally. thats all i needed.
if it is, then the 103 degree coolant or hotter should be reaching the water cut valve and the hose should feel the same on both sides if its working.
if the thermostat and heater valve are working and you STILL have no heat. Then the air mix door is not operating. Either because of the air mix actuator or the in cabin temp sensor itself.
if you need anyhting else let me know, if not be sure to leave a kind rating please.