Happy New Year

Here is a forum question and answer on this:
Maytag side/side model#:MSD2756DEB

About a month ago I started noticing some water leaking underneath my freezer door and about the same time I noticed that my fridge and freezer were not cooling as efficiently as before. Deciding to plunge into repairs, I took apart the back panel and vacuumed up everything I could see that was in need of it. Still, no better on the cooling.
After surfing this site I got the idea to check out back portion of the freezer. Sure enough, the back cover had about an inch of ice that I could see from the just looking in by the door. I shut off the fridge, and started warming up the firdge. Used a hair dryer to defrost the cover, and once I got into the back cover I found the whole coil frozen over. From top to bottom. I defrosted the whole thing. Took about 2 hours and looked around, but really couldn’t see anything major (leaks or broken wires). Put everything back together, and plugged in the fridge and everything works great.
Now its been about 3 weeks and I am seeing the icey build up on the panel in the back of the freezer again. I think I am going to replace the heater/thermostat assembly tomorrow. (maytag part # 61006199)
90% of the time on these Maytag’s the Defrost Board Part#61005988 will be the problem when the evaporator coil is all frosted up like that.
To be sure, I always do a continuity check with a ohm meter on the defrost thermostat and the heater assembly. You can get a very cheap ohm meter at Radio Shack, and test these with the power off to the refrigerator.
Here is a blog entry i did back in July, this is the same part you will need if your defrost thermostat and heater test good. You can even order that defrost board from my blog entry by clicking on the picture or the part#.
This thread talks all about it, and explains how to change it.