Iced-over evaporator coils, accompanied by a non-chilled fresh food compartment, happened in my GE side-by-side (model GSS20IEMDWW). For me,
the problem was caused by a faulty temp sensor in the fresh food side.
That sensor never signalled the computer that the temp in the fresh food side was cool enough, so the compressor ran constantly.
the compressor was running constantly, the evaporator coils (back wall
of the freezer compartment) eventually iced over (took about a week).
Since the fan that draws air over the evaporator coils could no longer
move any air (due to the icing), the temperature in the fresh food side got warmer as well.
The fresh food side is chilled through a hole with
a motorized door at the top of the dividing wall between compartments which opens when the fresh food side needs cooling. If no air is
moving in the freezer compartment, temps in the fresh food compartment
I replaced the temp sensor in the fresh food side and
solved the problem for a while.
I bough a pair of thermometers at a kitchen store and put one in the freezer compartment and one in the fresh food compartment so that I could occasionally check to see if it made sense for the compressor to be running (ie, was it really necessary to be trying to cool either compartment, or were they already cold enough).
About six months later I had the coil icing problem again. This time the fresh food side seemed cool enough (according to the thermometer as well as the fact that the flapper door would close, indicating that the computer knew to not try to additionally cool the fresh food side).
The thermometer indicated that the temp in the freezer compartment was cold enough, but the system computer continued to run the compressor. So I replaced both temp sensors in the freezer
compartment - which solved the problem again. (My fridge is about seven years old.)
you are going to replace any of the temp sensors, replace them all
under the principle of "if one failed, the rest will soon fail too".
Use a website like www.partselect.com
to look up a parts diagram for your fridge and see if you can order just the temp sensors. Other websites (www.repairclinic.com
) may also be helpful. I have no affiliation with any of the sites I just mentioned - I'm just posting them as resources.