Does the blower spin by hand?
Yes, it does. I should have mentioned that. I can freely spin it either direction by hand.
If you can pull the NUC apart etc then you should be able to run 5v to it and test it.
You shouldn't have to do this testing yourself. Shame on Intel for not at least testing the fan before shipping.
Return the unit for replacement either through your point of purchase or by contacting Intel Customer Support directly.