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

Safety first: Unplug the Belling freezer from the mains before removing any panels. Use insulated tools and avoid working on live circuits.

Step-by-step checks:

• 1. Power reset: Disconnect power for 5–10 minutes, then reconnect. If E1 clears and does not return, it may have been a temporary glitch.
• 2. Locate the cabinet NTC sensor: On most Belling freezers this is clipped to the evaporator cover or mounted on the liner wall behind a small plastic cover. Remove the inner panel carefully to access it.
• 3. Inspect wiring: Check the sensor leads from the NTC to the main control PCB (usually in the top fascia or rear control box). Look for cuts, pinched wires, or signs of rodent damage. Reseat any loose connectors.
• 4. Test the sensor: With the freezer unplugged, disconnect the NTC from the harness and measure resistance with a multimeter. At around 20°C, most Belling NTCs read roughly 4–10 kΩ (check service sheet if available). If the reading is open circuit, shorted, or wildly out of range, the sensor is faulty.
• 5. Check at the PCB: If the sensor tests OK at the sensor end, measure resistance at the PCB connector to confirm the harness is intact. If readings differ significantly, the harness is damaged.
• 6. Replace faulty parts: If the NTC is defective, replace it with a compatible Belling cabinet temperature sensor. If wiring and sensor are good but E1 persists, the main control PCB temperature input may be faulty and should be replaced.

When to call a technician: If you are not comfortable removing inner panels or testing resistance, or if PCB replacement is required, contact a qualified appliance engineer.