The convection fan started making noise about 9 months of light use.  It finally died after 13 months.  (One month out of warranty).  So I was provided the name of an authorized service center and paid to get the fan replaced.  Once again 9 months after replacing my Fan, it has died again.  I have no idea if I was unlucky and got two fans in a row that die within a year or if there is a design problem.  I presented this problem to LG Service and this was their response.

"Thank you for getting back to us regarding the case on the range, Evan and I completely understand your point there given how old the unit is. Yet, as much as I wish to help you, the support department has noted that the request was declined wherein processing any coverage to the unit is no longer applicable so even if I resend the request, we will only receive the same response. I hope for your kind understanding."  

I figured I would post in case it helps anyone in making a purchase decision.