Samsung Refrigerator Error Code F-1 (Ambient-Sensor Error)

The F-1 code means the main control board has detected a problem with the ambient temperature sensor circuit. The fault can be caused by a disconnected sensor, a contact error at the PCB connector, a broken wire, or a short circuit in the sensor itself. The expected voltage at connector CN32 pins 1 through 4 on the main PCB should fall between 1.0V and 4.5V. A reading outside that range confirms the circuit has an active fault.

A failed ambient sensor means the control board may not accurately adjust cooling cycles for the surrounding room temperature. This can cause the unit to run less efficiently or maintain inconsistent internal temperatures. While there is no immediate safety hazard in most cases, food preservation could be affected, so the issue should be addressed promptly.

A power cycle reset may temporarily clear the F-1 code from the display, but it will return if the underlying sensor circuit fault has not been corrected. Resetting is useful as a first step to confirm the error is persistent, but a voltage check at CN32 and a physical inspection of the sensor and harness are necessary to resolve the root cause permanently.

Some causes of the F-1 error, such as a loose harness connector at CN32 on the main PCB, can be corrected without replacing parts. You should start by unplugging the refrigerator, locating the ambient sensor connector, and reseating it firmly. If the error returns after restoring power, further diagnostic steps such as voltage testing at CN32 and harness continuity checks are needed, which may require a multimeter and some electrical knowledge.

If only a harness connector needs reseating or a wire needs repair, the cost can be minimal. Replacing the ambient sensor itself typically costs between $15 and $60 for the part, with professional labor adding $80 to $200 depending on your region and the service provider. If the main PCB is also damaged due to a sustained short circuit, repair costs will be higher.