Display shows E1, freezer may not maintain correct temperature or may shut down cooling intermittently.

Safety first: Unplug the freezer before removing any interior panels or accessing the control board.

• Step 1 – Locate the thermistor: On JennAir freezers, the thermistor is typically clipped to the evaporator cover or liner wall behind a small plastic cover. Remove shelves and the rear interior panel if necessary.
• Step 2 – Inspect wiring: Check the thermistor leads for cuts, pinches, or signs of moisture damage. Ensure the connector is fully seated on the harness.
• Step 3 – Basic resistance check (for skilled DIYers): With the thermistor disconnected and at room temperature, measure resistance with a multimeter. Most NTC thermistors will read between 8–12 kΩ at 77°F (25°C). A reading of 0 Ω (short) or infinite (open) indicates a bad sensor.
• Step 4 – Replace thermistor: If readings are out of range, replace the freezer thermistor with a JennAir-compatible part. Route the new sensor wiring along the original path and secure it away from moving parts and sharp edges.
• Step 5 – If E1 persists: The main control board’s sensor input may be defective. Board replacement should be performed by a professional.