Diagnostics show E1; refrigerator temperature display may be inaccurate or show dashes.

Safety first: Unplug the refrigerator before accessing sensors or control boards.

Steps to resolve:

• Locate the thermistor: In many KitchenAid models, the refrigerator thermistor is behind a small plastic cover on the rear interior wall of the fresh food section.
• Inspect wiring: Remove the cover and visually inspect the sensor and wires for damage, corrosion, or disconnection.
• Check placement: Ensure the thermistor is not touching the evaporator cover or an air vent directly, which can cause false readings.
• Reset control: After reseating the connector, restore power and see if the code clears.

If the E1 code returns, the thermistor should be tested with an ohmmeter and likely replaced. If a new thermistor does not resolve the issue, the main control board may be defective and should be evaluated by a technician.