Freezer not cooling at all; interior light works but compressor and fan are not running; no error code displayed.

Safety first: Unplug the freezer before removing covers or testing continuity. Mains voltage is dangerous.

Step-by-step checks:

• 1. Confirm outlet power: Plug another appliance into the same outlet to verify power. Check the household circuit breaker.
• 2. Check power cord: Inspect the Gram freezer's power cord for cuts, burns, or kinks. Replace if damaged.
• 3. Listen for any sounds: After plugging in, listen for clicks or hums from the compressor area. Absolute silence suggests a control or power issue.
• 4. Mechanical thermostat models: If your Gram freezer uses a mechanical thermostat, remove the control knob and cover, then test the thermostat for continuity when turned to a cold setting. Replace if open.
• 5. Electronic control models: If there is a display, but no cooling, access the main PCB and inspect for burnt relays or tracks. Reseat connectors.
• 6. Compressor start device: Check the compressor start relay and overload protector for continuity and signs of damage. Replace if faulty.

When to call a technician: If basic checks do not restore operation, or if the main PCB appears damaged, arrange service with a qualified technician.