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 tro run properly.
One other symptom, one of the two light bulbs (the upper one) in the refrigator 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 'frige, behind the bottom grill. Where do I start the troubleshooting?