The Light Switch is an OEM part for Frigidaire refrigerators. It is designed to control the interior lighting of the refrigerator; the switch activates when the door is opened and deactivates when closed.  Causes of a bad Light Switch can include mechanical wear from frequent use, which may cause the switch to fail to engage or disengage properly. Electrical issues such as short circuits or loose connections can also prevent the switch from functioning correctly. Symptoms of a bad Light Switch include: The refrigerator light staying on when the door is closed The light not turning on when the door is opened Flickering or intermittent lighting when the door position changes This OEM Frigidaire part is also compatible with Electrolux, Gibson, Kelvinator and some Kenmore models.This part fixes the following symptomsLight not working240505801 (AP2116563) replaces 240413601, 7240505801, 917528, AH430892, EA430892, PS430892.