Whirlpool Ice Maker Error Code On/Off LED blinking

The blinking On/Off LED on a Whirlpool ice maker indicates a bin thermistor failure. The control box has detected that the bin thermistor circuit is either open, shorted, or not connected. The ice maker will not produce ice while this fault is active. Resolving the issue requires inspecting the thermistor connection and testing or replacing the sensor as needed.

A reset will not permanently clear this error if the underlying thermistor problem is still present. The control box will detect the open or shorted circuit again and reactivate the fault indicator. The root cause, whether a loose connector, a failed thermistor, or damaged wiring, must be corrected before the error clears and stays clear.

If the fix is simply reseating a loose connector, there is no parts cost involved. If the bin thermistor itself has failed and needs replacement, parts typically range from around $15 to $50 depending on the model. If professional service is required, total repair costs including labor can range from $75 to $200 or more depending on your location and service provider.

Start by checking that the bin thermistor connector is fully plugged into the control box. If it is seated correctly, use a multimeter to test the thermistor's resistance. A reading of infinite resistance indicates an open thermistor, and a reading near zero indicates a shorted thermistor. In either case, replace the bin thermistor to clear the fault.

The ice maker is designed to stop ice production when this fault is detected, so it will not be operating normally. Continuing to use it in this state is not productive since no ice will be made. There is no immediate safety hazard from the thermistor fault itself, but the appliance should be serviced to restore proper operation.