What are the steps to troubleshoot no hot water coming out of just one faucet?
Silly suggestion, but have you checked if somebody turned off the water shutoff for just this faucet's hot water pipe?

Is this faucet on an outside wall? You shouldn't have any pipes running within exterior walls, but this may be a factor.

Do the pipes out of your water heater show any indication of running water if all the other faucets / showerheads are turned off? That may indicate a broken connection somewhere.