My fridge is a Fridgidaire Gallery(side by side) about a 2003, it has randomly frozen everything and it seems to happen when we have the windows open and the air conditioning off as it starts to heat up. I mentioned the environment just in case. I have not cleaned the fridge's vents or anything as of last year, but I will just because. I have the fridge and freezer turned way down, just a slight notch above off. The fridge is at around 40 degrees with those settings and the freezer is below freezing, I forgot the exact temperature. The freezer also randomly has a ton of frost in the upper part, but it seems to happen at different times than the freezing problem in the refrigerator, again just fully disclosing info. We are on a tight budget so I figured I'd give this a try. Thanks for your help in advance.