Kenmore Refrigerator Error Code Er IM Sensor

Er IM Sensor indicates that the refrigerator's main control board has detected an abnormal signal from the icemaker temperature sensor. In the built-in diagnostic display, this fault appears as Section B LED OFF. The code means the board cannot read a valid temperature from the icemaker sensor, which may be caused by a loose connector, a failed thermistor, or a damaged wiring harness.

This error does not pose a direct safety hazard to people or food. However, because the icemaker sensor is not functioning correctly, ice production may stop or behave erratically. The rest of the refrigerator's cooling functions are typically unaffected, so fresh and frozen food should remain at safe temperatures while you address the fault.

A power reset may temporarily clear the error code from the display, but if the underlying problem with the icemaker sensor or its wiring is still present, the code will return once the control board completes its diagnostic cycle. A lasting fix requires identifying and correcting the root cause, such as reseating the CON8 connector or replacing a faulty sensor.

Start by locating connector CON8 on the main PCB and checking that it is fully and securely seated. If the connection is solid, test the icemaker sensor itself with a multimeter to check for an open or shorted thermistor. Also inspect the wiring harness for any visible damage between the sensor and the board. Replacing the faulty component, whether the sensor or the harness, should clear the error.

If the fix is simply reseating a loose connector at CON8, there is no parts cost involved. Replacing the icemaker temperature sensor typically costs between $15 and $60 for the part depending on the specific model. If the main PCB needs replacement, costs generally range from $100 to $300 or more for the board alone, plus labor if a technician is performing the repair.