Refrigerator not cooling at all, interior light works but both fridge and freezer are warm.

Safety first: Unplug the refrigerator before removing rear covers. Do not attempt to open the sealed refrigeration system.

Basic checks:

• Listen for compressor operation when the unit is powered (before unplugging). A repeated clicking sound every few minutes suggests a start relay issue.
• Check that the condenser fan (near the compressor) runs when the compressor should be on.
• Ensure the condenser coils are clean and not blocked by dust.

Start components:

• With power disconnected, remove the start relay and overload protector from the compressor terminals.
• Shake the relay gently; if it rattles, it is likely faulty and should be replaced.
• Inspect for burn marks or melted plastic; replace any damaged components.

When to call a professional: If the compressor hums loudly then stops, or if it does not start even with a new relay, the compressor or sealed system may be defective. These repairs require a licensed refrigeration technician and specialized tools.