Frigidaire Refrigerator Error Code F-Sensor Error

The F-Sensor Error means the freezer compartment temperature sensor is reporting a value outside the valid range, specifically above 149°F or below -58°F. These readings are not physically realistic under normal operation and indicate the sensor, its wiring, or the main control board input circuit is faulty. The refrigerator displays this code because it cannot rely on the sensor data to regulate freezer temperature properly.

A power reset may temporarily clear the error display, but the code will return if the underlying fault is still present. The freezer sensor circuit must read within the valid voltage range of 1.0V to 4.5V at the main PCB before the error will stay resolved. Resetting without repairing the cause does not fix the problem and can allow the freezer to operate without reliable temperature control.

Repair costs vary depending on the root cause. Replacing the freezer thermistor is generally the least expensive fix, typically ranging from $50 to $150 including parts and labor. If the main PCB requires replacement, costs can range from $200 to $400 or more depending on the specific board and labor rates in your area. Getting a diagnostic inspection first will help clarify which component is at fault before committing to a repair cost.

Some steps are accessible to a knowledgeable DIYer, such as inspecting and reseating the wiring connectors at the main PCB or running a manual defrost to clear ice from around the sensor. However, properly diagnosing this error requires a multimeter to check the voltage at CN30 pin 3 relative to CN76 pin 1 and to test sensor resistance. If the fault points to the thermistor or main PCB, parts replacement is needed and comfort with appliance disassembly is required.

Continued use is not recommended without caution. The main control board cannot accurately regulate freezer temperature if the sensor is providing invalid data, meaning food may not be kept at safe temperatures. Check that the freezer is actually maintaining adequate cold and avoid storing perishable items until the sensor fault is diagnosed and repaired.