Understanding your Frigidaire refrigerator’s SY EF problem code Despite being known for their dependability and efficiency, Frigidaire refrigerators occasionally experience issues, just like any other equipment. The SY EF error code is among the most often seen error codes on Frigidaire refrigerators. Frigidaire refrigerators have an error code system to help users identify and diagnose problems with their units. One of the most common error codes users experience is the ...