Proline freezer shows E2 and may over-freeze or fail to maintain stable temperature.

Safety first: Disconnect the freezer from power before accessing internal components. Wear cut-resistant gloves when working near metal panels and coils.

Steps to address E2:

• 1. Access the evaporator compartment: Remove baskets and inner rear panel inside the freezer to expose the evaporator coil (often held by a few screws or clips). Do not force panels; look for hidden screws.
• 2. Locate the evaporator sensor: The NTC sensor is usually clipped to the evaporator tubing or embedded in a small plastic housing attached to the coil.
• 3. Visual inspection: Check if the sensor has come loose from the coil, if its wires are damaged, or if there is heavy ice buildup around it. If the sensor is simply out of position, re-clip it firmly to the coil.
• 4. Test the sensor: With the freezer unplugged, disconnect the sensor from its connector and measure resistance with a multimeter. Compare to expected NTC values (similar to cabinet sensor; check service data). Replace if open, shorted, or far out of range.
• 5. Check wiring to control board: Trace the sensor wires to the control box (often at the top or rear). Ensure there are no breaks or crushed sections and that the connector is fully seated on the main PCB.
• 6. Replace faulty sensor: Install a compatible Proline evaporator NTC sensor, secure it to the coil, and route wiring away from sharp edges and moving parts.
• 7. Defrost if iced over: If the evaporator is heavily iced, allow it to fully defrost (doors open, towels in place) before reassembly. Do not chip ice with sharp tools.

When to seek service: If the sensor and wiring are good but E2 remains, the main control PCB or software may be defective and should be checked by a professional.