“ENERGY SAVER” OR EFFICIENCY SWITCHES:
If you live in a warm, humid environment, you may have a problem with condensation forming on the outside of your refrigerator. This is known as “sweating.”
So-called “Energy Saver” switches control small, low-wattage “mullion” heaters in the side and door edge panels that prevent the outside of the refrigerator from getting cool enough for sweating to occur. In the “economy” position, the heaters are off. If the refrigerator mullions are sweating, turn the “energy saver” switch off. If you don’t have an “energy saver” switch, then you’re stuck with the problem. There’s nothing you can do.
Often, the first sign of an impending defrost problem will be that the mullions start to feel warm. If your mullions feel warm, you can turn off the “energy saver” switch, but it won’t be long before your refrigerator starts to show more advanced signs of cooling or defrost problems.