Freezer displays E1 and may run continuously or not cool correctly.

Safety first: Unplug the freezer and wear cut-resistant gloves when working near the evaporator fins—they are sharp.

• Access the evaporator: Remove baskets and shelves. Unscrew and remove the rear inner panel or bottom liner panel (depending on model) to expose the evaporator coil.
• Locate the sensor: The evaporator NTC is usually clipped to the evaporator tubing or embedded in a small plastic housing attached to the coil.
• Check for ice damage: Look for heavy ice buildup that may have pulled or broken the sensor wires. Carefully melt ice with a hair dryer on low, keeping it away from plastic parts and wiring.
• Test the sensor: Disconnect the sensor from its connector. Measure resistance at room temperature and compare to Haier NTC specs (commonly 5–20 kΩ at ~25°C). Infinite or near-zero resistance indicates a failed sensor.
• Replace the sensor: If faulty, install a new Haier evaporator temperature sensor. Clip it firmly to the same location on the coil to ensure accurate readings. Do not leave it dangling in free air.
• Inspect harness and board: Trace the harness back to the main control PCB. Repair any pinched or cut wires. Reseat the connector on the board. If the sensor and wiring are good but E1 remains, the control PCB may require replacement.