Freezer shows E2 and may over-freeze or fail to reach the correct temperature; compressor may run excessively.

Safety first: Unplug the freezer and wear cut-resistant gloves when working near metal fins and sharp sheet metal.

Access the evaporator:

• Remove freezer drawers and baskets to access the rear interior panel.
• Unscrew and gently pull off the rear evaporator cover; be careful not to damage the foam insulation or refrigerant lines.

Inspect the evaporator sensor:

• Locate the NTC clipped or taped to the evaporator tubing or embedded in a plastic holder on the coil.
• Ensure it is firmly attached to the coil; a loose sensor can cause incorrect readings and E2 errors.
• Check the wiring for ice damage, chafing, or broken insulation.

Test the sensor:

• Disconnect the sensor from its connector.
• Measure resistance with a multimeter. Compare to the cabinet sensor value at similar temperature; they should be in a similar range (typically several kΩ at room temperature).
• An open or shorted reading indicates a failed sensor.

Corrective actions:

• Re-seat or reattach: If the sensor has come loose, reattach it firmly to the evaporator tube using the original clip or aluminum tape.
• Replace sensor: If readings are out of spec, install a new Blomberg-compatible evaporator NTC. Route the cable along the original path, avoiding contact with heater elements.
• Check harness to PCB: At the main control board, verify the evaporator sensor connector is fully seated and not corroded.
• If all wiring and sensor are good but E2 persists, the main control board may be defective and require replacement.

Test: Refit the evaporator cover, restore power, and allow a full cooling cycle. Confirm that E2 does not return and that frost pattern on the evaporator is even.