GE Refrigerator Error Code F603

The F603 code means the fresh food door icemaker has entered fault mode after experiencing a Harvest Fault. The harvest cycle is when the icemaker releases formed ice cubes from the tray, and when this process fails to complete correctly, the icemaker shuts down and logs F603. The fault can be triggered by a blocked ejector, a failed heater or sensor, a faulty motor, or a wiring issue.

Resetting the refrigerator may temporarily clear the F603 code, but if the underlying cause has not been repaired, the fault will return once the icemaker attempts another harvest cycle. A reset is a useful first step to confirm whether the fault is intermittent, but it does not substitute for diagnosing and correcting the actual problem.

Repair costs vary depending on the failed component and whether a technician is involved. Replacing a harvest heater or thermistor typically falls in the range of $50 to $150 for parts alone. A full icemaker module replacement can range from $100 to $300 or more in parts, with labor adding additional cost depending on your area and the service provider.

Some causes of F603, such as an ice jam or obstruction in the ejector assembly, can be cleared by a homeowner without special tools. However, diagnosing and replacing components like the harvest heater, thermistor, or icemaker motor requires basic electrical testing skills and familiarity with appliance repair. If you are not comfortable testing component resistance or working with wiring connectors, a qualified technician is recommended.

The F603 fault is specific to the icemaker and does not indicate a safety hazard in the refrigerator itself. The icemaker has simply disabled itself to prevent further damage from a failed cycle. Your refrigerator's cooling and food preservation functions should continue to operate normally while the icemaker is in fault mode.