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Error code reference

GE Refrigerator Error Code F606

Fresh food door icemaker mold heater not heating

GE codesGE refrigerator codes

Fresh food door icemaker mold heater not heating — mold thermistor does not detect 3°F rise within 90 seconds.

First step from the service manual

Check icemaker mold heater (110 ohms) and thermistor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F606 means on a GE refrigerator

The F606 error code indicates a failure in the fresh food door icemaker's mold heater circuit. During a harvest cycle, the control board activates the mold heater to warm the ice mold just enough to release the ice cubes. The thermistor embedded in or near the mold monitors the temperature rise during this process. If the thermistor does not detect at least a 3°F increase within 90 seconds of the heater activating, the board logs F606 and typically halts the harvest cycle. This prevents the icemaker from attempting to eject ice that has not properly released from the mold.

The two primary components to inspect are the mold heater and the mold thermistor. The heater should measure approximately 110 ohms of resistance when tested with a multimeter at room temperature. A reading significantly higher, lower, or open (infinite resistance) indicates a failed heater element. The thermistor is a negative temperature coefficient (NTC) sensor, meaning its resistance decreases as temperature rises. If the thermistor is stuck reading a fixed value or is out of range, the board cannot confirm the temperature change even if the heater is functioning correctly.

Wiring and connections between the control board and these components are also worth inspecting. A loose pin connector, corroded terminal, or damaged wire harness in the door can interrupt the heater circuit or the thermistor signal. Because this icemaker is located in the fresh food door, the wiring passes through a door hinge area that experiences repeated flexing, making wire fatigue a realistic failure point over time.

Source: manufacturer service documentation.

Common causes of F606

  1. 01

    Failed mold heater

    Part replacement

    The mold heater element has burned out or developed an open circuit. Test it with a multimeter: a healthy heater reads approximately 110 ohms, while a failed one will read significantly off or show no continuity at all.

  2. 02

    Defective mold thermistor

    Part replacement

    The thermistor that monitors mold temperature may be reading incorrectly or have failed entirely, causing the board to see no temperature rise even if the heater is working. Check the thermistor's resistance and verify it changes with temperature.

  3. 03

    Damaged door wiring harness

    Part replacement

    The wiring routed through the fresh food door hinge flexes every time the door opens and closes. Over time this can cause wire breaks or frayed insulation that interrupt power to the heater or the thermistor signal back to the board.

  4. 04

    Loose or corroded connector

    Wiring / connection

    A connector pin at the icemaker module or along the door harness may have loosened or corroded, creating high resistance or an open connection in the heater or thermistor circuit. Inspect all connectors and reseat them firmly.

  5. 05

    Failed icemaker control module

    Part replacement

    If the heater, thermistor, and all wiring test within normal specifications, the icemaker module itself may not be supplying voltage to the heater correctly. This is a less common cause but should be considered after other components are ruled out.

See the test procedure for each cause

Frequently asked questions about F606

What does F606 mean on a GE refrigerator?
F606 means the fresh food door icemaker mold heater is not producing enough heat. Specifically, the mold thermistor did not detect a 3°F temperature rise within 90 seconds of the heater being activated during a harvest cycle. The refrigerator monitors this as a safety and performance check to ensure ice can be properly released from the mold.
Can I fix F606 myself, or do I need a technician?
A knowledgeable DIYer can test the mold heater for the correct resistance of approximately 110 ohms and inspect door wiring connections for visible damage or loose pins. However, replacing the heater, thermistor, or icemaker module requires disassembling the door-mounted icemaker, which can be complex. If you are not comfortable with electrical testing or appliance disassembly, a technician is the safer choice.
Is it safe to keep using my refrigerator while F606 is active?
The refrigerator's cooling and food preservation functions should remain unaffected by F606 since the error is isolated to the icemaker circuit. However, the icemaker will not produce ice correctly while the fault is present. It is safe to continue using the refrigerator for food storage, but you should address the fault to restore ice production.
How much does it cost to repair a GE refrigerator F606 error?
Repair costs vary depending on which component has failed. A replacement mold heater or thermistor typically runs in the range of $20 to $60 for the part alone. An icemaker module assembly can cost $80 to $200 or more. Adding professional labor, total repair costs commonly fall between $100 and $350 depending on the diagnosis and your location.
Will resetting the refrigerator clear the F606 code?
A power reset may temporarily clear the code from the display, but if the underlying component failure is still present, the code will return as soon as the icemaker attempts another harvest cycle. Resetting is useful for confirming whether the fault is intermittent, but it does not fix a failed heater, thermistor, or wiring issue. A proper repair of the faulty component is required for a permanent resolution.

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