Kenmore Refrigerator Error Code Er (secondary)

The Er secondary code indicates that the R2 sensor, which monitors the lower portion of the refrigerator compartment, has been detected as either shorted or open by the control board. This is a secondary error code, meaning it only appears when you enter the Display LED Check diagnostic mode and will not show during normal use. Importantly, the refrigerator continues to operate normally despite this fault being present.

Start by locating connector CON9 and inspecting the Gray to Gray wire pair for loose, corroded, or damaged pins, then reseat the connector firmly. If the connection is secure, trace the wiring harness to the R2 sensor and check for continuity and any physical damage. If the wiring is intact, test the R2 sensor's resistance against the expected range for the current compartment temperature, and replace the sensor if it reads out of range.

If the fix is simply reseating a loose connector at CON9, the repair may cost nothing beyond your time. If the R2 sensor itself needs replacement, parts typically range from $15 to $60 depending on the specific model. Professional diagnosis and labor, if you choose a technician, would add an additional $75 to $200 depending on your location and service provider.

A power reset may temporarily clear the code from memory, but if the underlying fault in the R2 sensor circuit still exists, the error will return. To permanently clear the code, the root cause such as a loose connection at CON9, damaged wiring, or a failed sensor must be diagnosed and repaired.

Yes, the error description confirms that all systems remain in normal operation while this code is active. The refrigerator will continue cooling and running its regular cycles. However, since the R2 sensor monitors the lower compartment temperature, it is advisable to repair the fault promptly to ensure accurate temperature management and avoid potential food safety issues over time.