Freezer displays E3 and does not reach the set temperature, compressor may run continuously.

Safety: Unplug the appliance before accessing the evaporator or defrost components.

• Check for heavy frost: Remove drawers and inspect the rear internal panel. If it is heavily iced over, the defrost system is likely faulty.
• Manual defrost: Leave the freezer unplugged with the door open for 12–24 hours (protect the floor from water). This may temporarily restore cooling but does not fix the underlying issue.
• Access the evaporator: Remove the inner rear panel to expose the evaporator coil and defrost components (sensor and thermostat/thermal fuse).
• Inspect the defrost sensor/thermostat: Look for broken clips, corrosion, or burnt connectors. Ensure the sensor is firmly attached to the evaporator tubing.
• Test continuity: With a multimeter, check the defrost thermostat/thermal fuse for continuity (should be closed at freezing temperatures). An open reading indicates a failed part.
• Replace faulty parts: Install a new Balay defrost sensor / thermostat assembly as per your model. Clip it securely to the evaporator and reconnect wiring using the original connectors.
• Reassemble and test: Refit the panel and drawers, restore power, and monitor for normal cooling and absence of the E3 code over the next 24 hours.

If the defrost sensor and thermostat test good, the issue may be with the main control board or defrost relay, which should be diagnosed by a technician.