That is not true. There is a difference between a recertified and refurbished hard drive. A big difference there is no need to call and complain like Joe said. All of my WD units are recertified and have no problems whatsoever theaction you should take is to calm down and understand what you think might be a problem.
First a couple of questions.
What USB 3.0 do you own? Can you please post the model number of the unit?
Second if you are concerned about the temperature you should monitor the temperature using a software first and then look at the specifications on the website to see if its normal.
You usually get 30 days of free tech support from your first call date. I dont think you would want to start the clock with the question “My hard drive feel hot?”
When it can be saved for a more serious issue.
Let me know which hard drive and obtain a temperture monitoring software and I will give you the specs to see if its normal or not.