From http://www.samsung.com/us/support/supportMain.do
Your refrigerator is equipped with an onboard diagnostic system. If the diagnostic
system detects a fault, it will display a specific line segment on you refrigerators
LED display. If your refrigerator is displaying an error code, please note the
error code, and reset the refrigerator by unplugging the refrigerator for 30
seconds. When the refrigerator is plugged in, it performs a self diagnostic
check of the various sensors and functions. If the error code reappears your
refrigerator will require service. Please click the "Create Online Service
Request" button below this article to initiate the service process. After
a power outage the display panel may start blinking "88 88." If you
unplug the unit for 30 seconds then plug it back in the display will return
to normal operation after several hours. The power outage/surge can cause a
communication error between the circuit boards in the unit. It can take several
hours for these boards to stabilize.
If the display does not reset, go to the Samsung Support link above, enter your model number, and follow the prompts to request a service ticket.
Good luck, and if this helps, please rate my answer!
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