I don't know if this is what has happened to you................ but here goes. I have the same problem right now with my Maytag wide by side. I discovered that the cooling coil in the freezer was all iced up and the passage that brings cold air into the refrigerator was iced up as well. My guess is that my defrost timer is not working and thus not defrosting the freezer when needed. I have defrosted the freezer twice now manually and my guess is that it will continue to happen till I get a repairman in here to fix it.
Try defrosting your freezer by unplugging it and using a hair dryer on the coil in the freezer compartment till no water drips off of it. This will work till it needs defrosting again (about a month or so). Best to get a repairman to look at it asap. BTW ... you may have to remove the panel inside the freezer on the back to see the cooling coil,
All the best to you and yours, Tom