The customer had (2) breakers fail which had the 6 blinks and they were for the master bathroom receptacles and the fridge. I noticed the breaker for the fridge was a 15 amp AFCI breaker with no GFCI protection. I supplied and installed (1) 20 gen type 7 duel function for the bathroom and (1) 15a for the fridge, after installing I tested the safety feature to ensure it was working. -Main Panel- Inside the main panel I found some open holes at the bottom of the panel along with a missing panel filler plate. The grounds inside the panel are all twisted together and the wiring make up of the panel is poor. I used a thermal imaging camera and see heat build up on the smart breakers due to them being landed on top of each other. I informed the homeowner that due to the two breakers failing that it will be a domino effect and the other may start to go out as well. I also suggested to have new Gen type 7 breakers installed of the the older Gen and separate the breakers to allow for better he