Daewoo Refrigerator Error Code EI

EI indicates a problem with the I-sensor, or ice sensor, in the automatic ice maker. The Main PCB has detected either a disconnection or a short circuit in that sensor circuit. The code is triggered when resistance measured at connector CN11 falls outside acceptable limits, and it typically causes the ice maker to stop functioning.

The refrigerator compartment and freezer will generally continue cooling, but the automatic ice maker will not operate reliably while this fault is active. There is no immediate safety hazard to food stored in the unit, but you should avoid relying on the ice maker until the fault is resolved.

A power reset may temporarily clear the code from the display, but the EI error will return if the underlying fault with the I-sensor or its wiring has not been corrected. The Main PCB continuously monitors the sensor circuit, so any ongoing disconnection or short circuit will cause the code to reappear. A permanent fix requires addressing the root cause through resistance testing and component repair or replacement.

A knowledgeable DIYer can start by checking whether the wiring harness to the ice maker is fully connected and free of visible damage, since a loose connector is sometimes all that is involved. Proper diagnosis beyond that requires a multimeter to measure resistance at CN11 on the Main PCB after separating the connector. If the sensor itself is faulty, replacing the I-sensor in the ice maker is the recommended repair.

If only the I-sensor needs replacement, parts and labor typically range from around $75 to $200 depending on your location and parts availability. If the wiring harness requires repair or replacement, costs can be similar in range. A Main PCB replacement, if needed, would be at the higher end of repair costs and could range from $150 to $400 or more.