Samsung French Door Fridge Freezer Not Cooling

Tired of paying bills for techs to come take a look and fix it.
Samsung french door fridge freezer not cooling. Never buy samsung refrigerator. If you re finding food in your fridge isn t keeping as fresh as it used to or you re not getting hit with a blast of really cool air when you open the fridge doors we ve got some things to check to make sure your refrigerator is cooling at an optimal temperature. If all of this has been completed then service repairs are what is needed. Vegetables milk gets spoiled within 5 days or less.
If the refrigerator is plugged in and powered on but it is still not cold enough you may have accidentally placed it or left it in demo mode. Cleaned the coils fan and condenser is working. There is no power going to the fan plug. Freezer is working perfectly fine.
All fans are working and evaporator coils are not frozen. If the refrigerator still does not cool service is required. Temperature stays 12 13 degrees that s about 56 degrees. Replace prices range from 380 to 800.
Will replacing the pantry temperature sensor fi read more. Looking at main control boards and even though they are suppose to match i find slight differences. If the refrigerator is not in cooling off mode has power and is still not cooling at all unplug the refrigerator or flip the circuit breaker for 2 minutes then plug it back in. I have 10 year old samsung rf268abrs french door refrigerator freezer.
Samsung refrigerator rf266aepn lower freezer not cooling. My samsung refrigerator is not cooling but my freezer is ok 01 the evaporator coils are frosted over the defrost heater assembly turns on a few times throughout the day to melt away any frost that may have accumulated on the evaporator coils. Not sure what else to look for. The refrigerator fan is not working.
I attached the fan to 12v car battery and it worked. Circuit is working and red light is steady red and not blinking. If it is in demo mode the display will read of of which will disable the compressor in order to save electricity when the refrigerator is on the showroom floor.