I finally purchased my first Festool.  Sadly it died during the 2nd time I used it.  The first time I was practicing with a few scrap pieces of wood switching between grits and modes for approximately 30 minutes.  The 2nd time I was using it I was using 120 grit in RO mode at a setting of 3.5 and it stopped.  I can turn the switch to off and then back on and it will run for a few seconds and then die again.  The head of the Rotex is warm but not hot.  Temperature where I was using the sander was around 50 F.  I'm at a loss and very disappointed in Festool.  What should I do?