Samsung Refrigerator Error Code 19

Error code 19 on a Samsung refrigerator indicates a problem with the CF sensor, which is the temperature sensor for the Arctic Select Zone. The code appears when the sensor reports a temperature outside the valid range of -58°F to 122°F, signaling an invalid reading rather than an actual extreme temperature. The cause is typically a wiring fault, connector issue, or failed sensor. The first place to check is connector CN30, pins No.5 and No.7.

A reset may temporarily clear the display of error code 19, but the code will return if the underlying fault is not repaired. If the CF sensor wiring is broken, shorted, or the sensor itself has failed, the control board will detect the invalid reading again and re-trigger the error. Address the root cause first before relying on a reset.

If the fix is simply reseating the connector at CN30, there may be no parts cost, only a service call fee if a technician is used. Replacing the CF sensor typically adds a parts cost in the range of $20 to $80 depending on availability and sourcing. If a wiring harness or control board replacement is needed, total repair costs can range from $100 to $300 or more including labor.

Some causes of error code 19 are DIY-friendly, such as reseating a loose connector at CN30 or repositioning a dislodged sensor housing. If the fix requires tracing wiring for damage or replacing the CF sensor, basic electrical troubleshooting skills and a multimeter are helpful. If the wiring harness is shorted or the main control board is involved, a qualified technician is recommended.

The refrigerator may continue to operate in other zones, but the Arctic Select Zone will likely not maintain accurate temperatures while error code 19 is active. Food stored in that compartment could be at risk depending on the intended temperature setting. It is best to move sensitive items to another section and address the fault promptly.