Display shows SEN or Sensor; freezer may not maintain correct temperature.

Safety first: Unplug the freezer before accessing the evaporator cover, liner, or control board. Sharp metal edges may be present; wear cut-resistant gloves.

• Step 1 – Power reset: Disconnect power for 5 minutes, then restore power to see if the SEN code clears. If it returns, continue.
• Step 2 – Locate thermistor: On most KitchenAid freezers, the thermistor is clipped to the evaporator cover or rear liner wall inside the freezer. Remove shelves and the rear interior panel if necessary.
• Step 3 – Inspect wiring: Check the thermistor leads for cuts, pinches, or corrosion at the connector. Reseat the connector firmly into the harness.
• Step 4 – Basic resistance check (if you have a meter): With the thermistor disconnected and still cold, measure its resistance. Typical values are 8–12 kΩ around 32°F (0°C). If it reads open (OL) or near 0 Ω, it is defective.
• Step 5 – Replace thermistor if suspect: Remove the old thermistor from its clip, install the new one in the same location, and reconnect the harness. Reinstall panels and restore power.

If a new thermistor does not clear the SEN code, the main control board may be misreading the sensor and should be evaluated or replaced by a technician.