Freezer beeps and displays E1, temperature rises above set point and food starts to soften.

Safety first: Unplug the Hoover freezer from the mains before removing any panels. Do not work on live circuits.

• Power reset: Disconnect power for 10 minutes, then reconnect. If E1 clears temporarily but returns, continue with checks.
• Locate the cabinet NTC: On most Hoover freezers the cabinet temperature sensor is clipped behind an internal liner cover or in a small plastic housing on the rear wall of the freezer compartment.
• Inspect wiring: Remove the inner cover (usually held by screws or clips). Check the sensor wires for cuts, pinches, or signs of moisture ingress. Reseat any plug connectors firmly.
• Check sensor resistance: With the appliance unplugged, disconnect the NTC from the harness and measure resistance with a multimeter. At around -18 °C, many Hoover NTCs read in the 15–40 kΩ range (exact value varies by model). An open circuit (OL) or 0 Ω indicates a failed sensor.
• Check at the PCB: Access the main control board (often in a rear lower service panel or top control housing). With power still disconnected, unplug the NTC connector and measure resistance at the board side to confirm continuity through the harness.
• Replace the NTC sensor if faulty: If readings are out of range or intermittent when you gently flex the cable, replace the cabinet temperature sensor (NTC) with a Hoover-compatible part. Route the new sensor along the original path and secure it away from moving parts or sharp edges.
• Reassemble and test: Refit covers, restore power, and allow several hours for the freezer to reach temperature. Confirm that the E1 code does not reappear.

When to call a technician: If the NTC and wiring test correctly but E1 persists, the main control board may be defective and should be diagnosed and replaced by a qualified technician.