Loud clicking noise from right side of dash board

I appreciate that. Same sort of thing I am thinking. Does dash have to come out to fix this problem and, if so, what kind of price could I expect for the repair?

The motors that operate the blend doors are all accessible without major disassemble the blend doors are actually inside the heater box. Its better to get things checked out before assuming the worst but disassemble of the heater box require dash disassemble, draining the cooling system and evacuating the air conditioning system. I just looked to see if there were any recalls or technical service bulletins from Nissan/Infinity to see if there was any recognized faults but there are none listed.