Frigidaire fridge and freezer warm

Last night my freezer warmed up to 39 degrees but the fridge stayed at 40. I unplugged it and plugged back in and freezer started dropping back down. This morning freezer started warming back up so I emptied it and then the fridge started warming up too. Now both of them are showing 70 degrees. All my food is now in coolers on the back porch. I am really glad it is winter!!!

Ever couple minutes I can hear a hum for about 30 seconds then it stops. Then a couple minutes later it does it again.

Can someone please point me in the right direction?