E3 error on display, freezer temperature unstable or incorrect compared to set value.

Safety: Disconnect the freezer from mains power before opening the control panel.

• Locate the ambient sensor: On many Hoover freezers with digital displays, the ambient sensor is located near the control panel or behind a small grille on the front/top fascia.
• Remove control fascia: Carefully unclip or unscrew the control housing. Take care not to pull on the wiring.
• Inspect sensor and wiring: Look for a small probe-type sensor or thermistor on a pair of thin wires. Check for broken insulation, loose connectors, or corrosion.
• Test the sensor: With the freezer unplugged, disconnect the sensor and measure resistance at room temperature (around 20–25 °C). Typical NTC values are in the 5–20 kΩ range. An open or shorted reading indicates a failed sensor.
• Check harness to PCB: If the sensor tests OK, check continuity from the sensor connector to the main PCB connector to rule out a broken wire.
• Replace if faulty: Install a new ambient temperature sensor (NTC) compatible with your Hoover model if the original is out of spec. Route the wiring as originally installed and secure it away from sharp edges.
• Reassemble and test: Refit the control fascia, restore power, and verify that the E3 code clears and the displayed temperature is stable.

Call a professional: If the sensor and wiring are confirmed good, the main control board may be defective and should be replaced by a technician.