4389102 Ice Level Optics Board Diagnostics & Replacement
Whirlpool built refrigerators (also found on Jenn Air, Kenmore, Kitchen Aid, and Maytag brand refrigerators) with the ice bin located in the door use two optic control boards (part# 4389102) to tell when the ice bin is full of ice. There is an emitter control board that sends out an infrared beam, and a receiver board that receives the infrared beam. When the ice container fills up with ice, the beam is blocked, and it tells the ice maker to stop filling up with ice. If the ice maker optic control boards fail, it can cause the ice maker to continue to make ice even when it is full of ice or turned off, or it can cause the ice maker to not produce any ice at all. The optics control boards are replaced as a set, even if only one of the two control boards are bad, both will need to be replaced.
How To Test The Whirlpool Ice Maker Optic Control Boards 4389102
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).
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.
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
First, unplug the refrigerator.
Remove the three Phillips screws on the right hand side.
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.
Next, remove the three Phillips screws on the left hand side.
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.
Do you need to replace the optic control boards? Click the link below to visit our store and purchase new ones. Be careful when shopping around for this part, as many stores sell a lower quality knockoff version of this part. You can be assured when you order the optics control board kit from Parts Dr that you are receiving a new OEM part.