On Jan 28, 2:12 pm, "Frank from Deeeetroit"
wrote:
I have a 4 year old GE side by side refrigerator. The evaporator coils
freeze-up about once a month. We have to un-plug the 'fridge and let the
coils thaw out for the unit to run properly.

One other symptom, one of the two light bulbs (the upper one) in the
refrigerator side of the unit will not work. A new bulb will not work, the
switch is good, the second bulb works.

I have a basic understanding of the system. I thawed out the coils two days
ago and vacuumed out the area under the 'fridge, behind the bottom grill.
Where do I start the troubleshooting?

If understand correctly the coils in the freezer side ice up?
Maybe the automatic defrost circuit is not working? It usually
comprises a timer switch, and heaters that thaw out the ice so it runs
away through a drain.
Many years ago our defrost timer stopped working (the little clock
motor that ran it went open); cos otherwise i might have been able to
repair the timer switch.
It took Sears and myself a couple of weeks to bring in a replacement
and myself to install it. In meantime we wired a temporary manual
switch in place of the timer. Had to remember to not leave it in the
defrost mode before going to bed!
It's worked now for at least 15 or more years.