Samsung Refrigerator Error Code 1Er

The 1Er code indicates a freezer sensor error. The main control board has detected a problem with the freezer temperature sensor circuit, which can include a disconnected or short-circuited sensor, a loose connector, physical damage to the sensor housing, or a temperature reading outside the acceptable range of -50 degrees Celsius to 65 degrees Celsius. The refrigerator cannot reliably monitor or control freezer temperature until the fault is corrected.

A power reset may temporarily clear the display, but the 1Er code will return if the underlying sensor circuit fault is not corrected. The control board runs continuous checks on the sensor voltage and will re-trigger the error as soon as it detects the out-of-range condition again. A reset is useful for confirming whether the fault is intermittent, but it is not a fix.

Repair costs vary depending on the root cause. A replacement freezer thermistor is typically an inexpensive part, and combined with labor the total repair cost usually falls in the range of $100 to $250. If the main PCB requires replacement, costs can range from $200 to $450 or more depending on the model and whether the repair is done by a professional technician.

In some cases, yes. If the cause is a loose connector at the sensor housing or at the main PCB CN20 port, reseating the connector may clear the error without any parts. If the thermistor or wiring harness is damaged, replacing the affected component is a repair many experienced DIYers can complete. However, if the main PCB is at fault, professional service is recommended due to the cost and complexity of board replacement.

It is not advisable to rely on the refrigerator for extended periods while 1Er is active. Because the control board cannot trust the freezer temperature reading, it may not regulate the compressor and defrost cycle correctly, which can lead to food safety issues in the freezer. Check the actual freezer temperature with a separate thermometer and address the fault as soon as possible.