Answer Eileen, First check and make sure the sensor system is ON( the assembly on the right wall of the freezer). Close the door and wait a minute or two, then open the freezer door. Observe the LED light on the sensor assembly. If the light blinks two times and pauses then repeats the two flashes, press in on the emitter flapper on the left side wall. The LED light Should change to a "solid" light display. If the LED continues to flash replace the W11629974 optic sensor control boards. The part is in stock and available at this time. Thanks, Read More... Answered by AppliancePartsPros.com | Tuesday, May 31, 2016