LG Refrigerator Error Code Er SS

Er SS indicates a room temperature sensor failure in your LG refrigerator. This code is unique in that it does not appear on the main display during normal operation. It only shows up when you enter the diagnostic checking display mode by pressing and holding the refrigerator and freezer warmer keys simultaneously for more than one second. The sensor circuit is evaluated by measuring voltage at POINT D, with normal readings falling between 0.5V and 4.5V.

Because Er SS only appears in the diagnostic display and not during normal operation, the refrigerator may continue running without obvious symptoms. However, a malfunctioning room temperature sensor can affect how accurately the control board manages cooling, which could eventually impact food safety or energy efficiency. It is best to have the sensor circuit diagnosed and repaired promptly rather than leaving it unaddressed.

Repair costs depend on which component has failed. A replacement room temperature thermistor is generally an affordable part, and the total repair cost including labor typically falls in the range of $100 to $200. If the main control board is at fault, parts alone can range from $150 to $350 or more, with labor adding to the total. Getting a diagnostic service call first is a good way to confirm the exact cause before committing to parts.

Some causes of Er SS are accessible to a knowledgeable DIYer. You can inspect the wiring harness and sensor connector for visible damage, corrosion, or loose connections and attempt to reseat or clean them. However, accurately diagnosing the fault requires a voltmeter to check POINT D voltage, and replacing a defective thermistor or control board requires comfort working with appliance electronics. If you are not confident with electrical diagnostics, a qualified technician is the safer choice.

A power reset by unplugging the refrigerator for a few minutes may temporarily clear the code from the diagnostic display, but it will return if the underlying sensor circuit fault is still present. The Er SS code reflects an actual electrical condition at the sensor, specifically a voltage reading outside the normal 0.5V to 4.5V range. A lasting fix requires identifying and correcting the root cause, whether that is a failed thermistor, damaged wiring, or a control board issue.