Whirlpool Ice Maker Error Code On/Off LED and Max Ice LED blinking

When both the On/Off LED and the Max Ice LED blink at the same time, the ice maker is signaling a harvest failure. This means the unit attempted to drop a batch of ice but could not confirm the cycle completed. The fault typically points to the evaporator thermistor or the sealed refrigeration system, including the hot gas valve or refrigerant charge.

A reset may temporarily clear the blinking LED indicators, but if the underlying problem has not been corrected, the fault will return once the unit attempts another harvest cycle. A reset is useful for confirming whether the fault is intermittent, such as a loose thermistor connection, but it is not a repair. Address the root cause before relying on a reset.

Repair costs vary depending on the root cause. Replacing an evaporator thermistor is generally a lower-cost repair, typically ranging from around 50 to 150 dollars for parts and labor. Sealed system repairs involving refrigerant recharge, a hot gas valve replacement, or restriction removal are more involved and can range from 200 to 600 dollars or more depending on the technician's rates and the extent of the work needed.

Start by checking that the evaporator thermistor is firmly attached to the sealed system tubing and that its connector is fully seated in the control box. Test the thermistor resistance and compare it to the expected value for the current temperature. If the thermistor checks good, inspect the evaporator plate for an unusual frost pattern, which can indicate a refrigerant or hot gas valve issue that will require a certified technician to address.

The ice maker is not producing ice properly while this fault is active, so continued use will not yield usable output. There is no immediate safety hazard to the home from the blinking fault itself, but running the unit repeatedly through failed cycles without diagnosis can cause additional wear on components. It is best to diagnose and repair the issue promptly.