Frigidaire Refrigerator Error Code Er IS

Er IS stands for an icing sensor error. It means the control board has detected either a short circuit or a disconnection in the icing sensor circuit. This prevents the refrigerator from receiving a valid signal from that sensor. The fault can originate in the wiring, the connector, or the sensor itself.

A faulty icing sensor can affect how the refrigerator manages frost and temperature conditions, which may impact food preservation over time. While the unit may continue running, it is best to diagnose and resolve the fault promptly. Leaving a sensor circuit fault unaddressed can sometimes lead to secondary issues such as excess ice buildup or temperature inconsistencies.

Repair costs vary depending on the root cause. If only a connector needs reseating or cleaning, there may be no parts cost, and a service call fee would be the primary expense. Replacing the icing sensor itself is typically a low to moderate cost repair, with parts generally ranging from around $15 to $60 depending on the model, plus any labor charges if a technician is used.

Start by inspecting every wire and connector associated with the icing sensor for looseness, damage, or corrosion. Reseat any loose connectors firmly. If the wiring looks intact, test the sensor's resistance to determine whether the sensor has failed. Replace any damaged wiring harness sections or the sensor itself as needed.

A power reset may temporarily clear the code from the display, but the error will return if the underlying fault in the icing sensor circuit has not been corrected. A reset is useful for confirming whether the fault is persistent, but it is not a fix. The wiring and sensor must be inspected and repaired or replaced to permanently resolve the error.