Display shows E2 and freezer temperature is too warm or reading incorrectly.

Safety first: Unplug the refrigerator before removing any freezer panels.

Locate the freezer thermistor: On Insignia models, the freezer thermistor is usually clipped to the evaporator coil or mounted behind the rear freezer panel.

• Remove freezer rear panel: Take out shelves and drawers. Remove screws holding the rear panel and gently pull it forward to expose the evaporator and wiring.
• Inspect thermistor: Look for a small plastic-encased sensor attached to the evaporator tubing or nearby wall. Check for cracked housing, ice damage, or broken wires.
• Check wiring and connector: Follow the thermistor wires to the connector. Ensure it is fully seated and not corroded. Reseat the connector.
• Test resistance (if possible): With the unit unplugged, disconnect the thermistor and measure resistance. Compare to expected NTC values (higher resistance when cold, lower when warm). An open or shorted reading indicates failure.
• Replace if defective: Install a new Insignia-compatible freezer thermistor, securing it in the same location on the evaporator or wall. Avoid kinking the wires.
• Reassemble and test: Reinstall the rear panel, drawers, and shelves. Restore power and monitor for several hours to confirm the E2 code clears and freezer temperature stabilizes.

Technician tip: If the thermistor tests good but E2 persists, the main control board is likely at fault.