The stove is a Frigidaire Gallery Gas Range #GCRG3060AFC. The first stove was purchased in June of 2020. It worked fine for a couple of weeks then began beeping and the display would show "666...". The number of 6's would vary. It seemed to happen after the oven was preheated. Pressing the TIMER button would do nothing. Then after a few minutes the control display would beep and then the timer could be set normally. The problem got worse over the next few months. I called Frigidaire and they sent A&E to determine the problem. They told me to unplug the stove whenever it malfunctioned which is not the correct answer. I talked with the business that sold me the unit and they agreed to change the main display pc board which didn't fix the problem so they replaced the stove with a brand new one. The new unit worked fine for about 4 months and recently began the "6666's" and beeping and timer not being able to be set. I've talked with the Frigidaire customer service and they really don't seem like they want to help. Does this issue sound familiar to anyone else? Is there a fix? Any help would be greatly appreciated! Thank you for your interest!