I recently just got a slew of calls from 4" cans (IC rated) we put in 2-4 yrs ago with thermocouples built in. Not sure what it is but they are nothing but trouble from what I"ve seen. They either trap too much heat, the thermocouples are crap and just going bad?? Has there been a recall on 4" cans anyone knows about or is anyone else having more than normal calls about blinking cans installed from a while back?? For now I"m going to go and try to excavate any excessive insulation above them and put some socket extenders in and see if that works first.