I have a Maytag side by side and the refrigerator isn't cooling. The freezer is cold but has a big icebuildup in the bottom. Also the icemaker is wooring poorly and the spindle thing is frozen in. I checked the fan and it is working. I emptied everything out last night and let it all thaw out. Going to check it later today to see if it works. Any ideas what cause the fridge not to cool or the icebuilup in the freezer?