Freezer not cooling at all; interior is room temperature, lights may work but no humming from compressor.

Safety: Unplug the freezer before accessing electrical components. Use caution around live circuits if voltage tests are required.

Steps:

• Confirm power: Test the outlet with another appliance. Check the freezer’s power cord and plug for damage.
• Check control settings: Ensure the unit is not in an off or demo mode and that the temperature control is not set to OFF.
• Listen for compressor: With the unit plugged in and set to cold, listen at the back. If the compressor is silent and there is no clicking, the control or thermostat may not be sending power.
• Test the thermostat (mechanical models): Unplug the unit, access the thermostat behind the control knob, and check for continuity when turned to a cold setting. Replace if open.
• Inspect start relay and overload: Follow the E5 procedure to test and replace these components if they are faulty.
• Check control board (electronic models): Look for burned components or blown fuses on the board. Replace the board if visibly damaged and other components test good.

Note: If the compressor receives proper voltage but does not start or only hums and overheats, the compressor itself may be locked and require professional replacement.