GE Refrigerator Error Code F-1- (segment b)

This code indicates a Freezer Sensor Error, specifically a sensor part error. The main control board is not receiving a valid voltage signal from the freezer temperature sensor. Technicians diagnose this by measuring voltage at MAIN PCB connectors CN30 pin 3 and CN75 pin 1, which should read between 1.0V and 4.5V under normal conditions. A reading outside that range points to a failed sensor, wiring fault, or a board issue.

Operating the refrigerator with an active F-1- (segment b) error carries some risk because the control board may not accurately regulate freezer temperature without a functioning sensor. Food in the freezer could be exposed to temperatures that are too warm or too cold without reliable monitoring. It is best to address the fault promptly and check freezer contents with a separate thermometer in the meantime.

A reset may temporarily clear the error code from the display, but the code will return if the underlying fault with the freezer sensor or its wiring has not been corrected. Resetting without repairing the cause does not restore accurate temperature monitoring. The proper fix requires identifying and resolving the root cause, whether that is a failed sensor, a wiring fault, or a board issue.

A knowledgeable DIYer can inspect the wiring harness and connector terminals at CN30 and CN75 for obvious damage or looseness, and reseat connectors as a first step. Replacing the freezer temperature sensor is also a manageable repair if you are comfortable working with refrigerator wiring. However, verifying the exact voltage at the PCB connector pins requires a multimeter and some familiarity with reading wiring diagrams, so professional service is recommended if you are unsure.

If only the freezer temperature sensor needs replacement, repair costs typically range from around $75 to $200 depending on parts and labor rates in your area. If the main PCB is at fault, costs can range from $200 to $500 or more. Getting a diagnostic assessment from a qualified technician will help confirm which component is responsible before committing to parts.