I thought this would have been fixed on the newer series radios, but seems not. I have two 6400s bought at different times (one a pre-order and one in November 2018). Both are down due to fan failures. Both are kept in pristine environments separated by approximately 200 miles (i.e. this isn't environmental). Anyone else have fan failures on the new models? Since flex is making me pay the return shipping for these is there a home-fix for this? I have owned a 6300 (fan died within warranty) I owned a 6700 (fan died within warranty) I owned another 6700, power output issue - died within warranty I owned a 6400, came DOA I own another 6400, fan failure within warranty (backup radio - probably has been used a dozen times) I own another 6400, fan failure within warranty (backup remote radio - probably has been used a dozen times) I own a 6600, is ok so far. I own a PGXL - had to be returned to be fixed in the warranty period.