Super Exquisite and Durable Icemaker Control Board KitHow To Test The Whirlpool Ice Maker Optic Control Boards 4389102Diagnostics 1 : First, open the freezer door and look at the status LED on the right hand side. Make sure the ice maker control is turned ?ON?. The status LED should blink twice, pause, and then repeat (blink blink?. pause. blink blink? pause).Diagnostics 2 : Next, with the freezer door open, hold down the flapper door on the left hand side to un-block the optics beam. With the optics beam unblocked, the status LED should light up and stay on (not blink). If the status LED continues to blink twice, then you have faulty optic control boards and they will need to be replaced.Diagnostics 3 : If there is no status LED light, then the ice maker could be in ?harvest? mode. Hold down the freezer light switch, the status LED should flash every second while in harvest mode. If the LED light still does not light up, then the optic control boards will need to be replaced.How To Replace The Whirlpool Ice Maker Optic Control Boards 4389102 Step1: First, unplug the refrigerator.Remove the three Phillips screws on the right hand side.Step2: Disconnect the wire harness on the back side and then remove the two Phillips screws to release the receiver control board from the housing. Re-install the receiver board in the reverse order.Step3: Next, remove the three Phillips screws on the left hand side.Step4: Disconnect the wire harness on the top side and then remove the two Phillips screws to release the emitter control board from the housing. Re-install the emitter board in the reverse order.Specification: Brand: BTNTVEN Condition: 100% Brand New and never used Package Includes: 1 x 4389102 Icemaker Sensor Control Board Kit with Instruction Manual