Kenmore Air Conditioner Error Code ES

The ES code means the evaporator coil temperature sensor has failed or is sending a signal outside the acceptable range to the control board. The evaporator coil sensor is a thermistor that helps the unit regulate its cooling cycles and prevent ice buildup. When this sensor malfunctions, the air conditioner stops operating normally to protect the system. A technician will need to diagnose and replace the faulty component.

You should not continue running the unit while the ES code is active. The evaporator coil sensor is what prevents the coil from icing over and protects the compressor from operating under unsafe thermal conditions. Running the unit without a functioning sensor risks coil icing, reduced airflow, and potential compressor damage. Turn the unit off and contact a technician.

Repair costs depend on the specific failed component and whether the unit is under warranty. A thermistor sensor replacement is generally among the lower-cost repairs, typically ranging from around $75 to $200 including parts and labor. If the control board is the cause, costs can be higher, often in the $150 to $350 range. Contact 1-800-4-MY-HOME (1-800-469-4663) for a service estimate specific to your model.

Kenmore directs repair of the ES fault to their service line at 1-800-4-MY-HOME (1-800-469-4663) rather than DIY troubleshooting. The repair involves accessing internal electrical components near the evaporator coil, which requires disassembly of the unit. Unless you have experience with appliance electrical diagnostics, professional service is the recommended approach.

A power reset by unplugging the unit for a few minutes may temporarily clear the code if the fault was caused by a one-time signal glitch, but it will return if the sensor or its wiring has actually failed. The ES code indicates a hardware problem that a reset cannot fix. If the code reappears after a reset, the sensor or a related component needs to be inspected and replaced.