Freezer beeps and displays E1; temperature is higher than setpoint and struggles to reach -18°C.

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

Steps to check and address E1 (cabinet sensor):

• 1. Power reset: Disconnect power for 5–10 minutes, then reconnect. If E1 returns within a few minutes, continue with diagnosis.
• 2. Locate the cabinet NTC: On most Leisure freezers, the cabinet temperature sensor is clipped behind the inner liner, often near the evaporator cover or side wall. Remove the internal plastic cover or sensor cap carefully.
• 3. Inspect wiring: Check the sensor leads from the NTC to the main control PCB (usually behind the rear lower panel or in the control housing). Look for cuts, crushed insulation, or loose connectors. Reseat the plug on the PCB.
• 4. Test the NTC: With the freezer unplugged, disconnect the NTC from the harness and measure resistance with a multimeter. At room temperature (~25°C) most Leisure NTCs read around 5–10 kΩ (check service sheet if available). If the reading is open circuit (OL) or near 0 Ω, the sensor is faulty.
• 5. Replace the NTC if faulty: Order a compatible Leisure cabinet NTC sensor using the model number. Clip the new sensor into the original position, route the wires along the factory path, and secure with cable ties to avoid contact with moving parts or sharp edges.
• 6. Reassemble and test: Refit covers, restore power, and set the freezer to -18°C. Allow several hours. The E1 code should clear automatically once the control detects a valid sensor signal.
• 7. If E1 persists with a good sensor: The main control PCB may be misreading the sensor. Inspect the PCB for burn marks or corrosion. Replacement of the main control PCB is recommended and is best done by a qualified technician.