KitchenAid Ice Maker Error Code LED flashes 5 times (Clean mode)

The 5-flash code during Clean mode means the control board could not detect a signal from the evaporator thermistor when it ran its diagnostic check at the start of the Clean cycle. The board requires a valid resistance reading from this sensor before proceeding. The issue is typically a loose connector, a broken wire in the harness, or a failed thermistor.

The ice maker will not complete the Clean cycle and may not return to normal ice production while this fault is active. Because the control board cannot read the evaporator thermistor, it lacks the temperature data needed to operate safely. Running the unit in this state is not recommended. Resolving the thermistor or wiring issue is required before the machine will function normally again.

Unplug the ice maker, disconnect the thermistor's harness connector, and set a multimeter to measure resistance in ohms. Place the probes on the thermistor terminals. At room temperature, most KitchenAid evaporator thermistors read in the range of 5,000 to 16,000 ohms, but check your specific model's service documentation for the exact spec. An open circuit reading or a value far outside the specified range confirms a failed thermistor. If resistance is within spec, the problem is in the wiring harness or control board.

Start by unplugging the ice maker and locating the evaporator thermistor, which is mounted on the evaporator inside the unit. Check that the wiring harness connector is fully seated at both the thermistor and control board ends. If the connection is secure, use a multimeter to measure the thermistor's resistance and compare it to the spec listed in your service manual. A reading of open circuit or far outside the expected range indicates a failed thermistor that needs replacement. If the thermistor tests good, inspect the harness wiring for breaks or corrosion.

If the fix is just reseating a loose connector, there is no parts cost. A replacement evaporator thermistor typically costs between $15 and $40 depending on the model. A new wiring harness runs roughly $20 to $60. If the control board is the cause, board replacement can range from $80 to $200 or more for parts alone. A technician service call will add $75 to $150 in labor on top of parts. This is a repair many owners handle themselves once the faulty component is identified.