My refrigerator LG LSC26905TT. Doesn't stop running and freezer side doesn't get freeze is cold but not get freeze anything and doesn't stop running all day long.
You will want to pull the rear cover off in the freezer compartment and check to see if the coils are impacted with ice. If they are then you will want to test the defrost sensor and heater for resistance. If either shows open then they are bad and if they do not have proper resistance they are bad. The Sensor should register approximately 42K ohms of resistance. IF they check ok then the main control board is the issue.