This story is not complete. Within our small RV Travel club we have had two Thor Class A motorhomes encounter failures and small contained fires from the IOTA ITS 50R in 2013, one of which is mine. It is interesting that Navistar and its operating company, Monaco RV LLP, have investigated this issue and found fault with the ATS. I trust their investigative abilites far greater than the opinions of other "experts" who have contributed to this thread. I filed a complaint with the NHTSA on December 28, 2013 relative to Thor products that use this same problematic ATS.
