Safety first: Unplug the freezer before accessing the rear components.

Check power and indicator lights: Confirm the unit is plugged in and the display or power light is on. Test the outlet with another appliance.
Listen for compressor: With power connected, listen at the back. A repeated clicking sound may indicate a failed start relay or overload.
Inspect start device: Remove the compressor terminal cover and check the start relay and overload for burn marks or loose connections.
Test start relay and overload: Use a multimeter to check continuity. Replace the Hitachi start relay/overload assembly if open or burnt.
Check compressor windings: Measure resistance between compressor terminals. If windings are open or shorted, the compressor is defective.
Control PCB: If the compressor and start components are good but never receive power, the main control PCB is likely faulty and should be replaced.
Technician required: Compressor replacement or sealed system work must be done by a licensed refrigeration technician.

Freezer not cooling at all, interior is warm and compressor is not running

Possible Causes