Freezer not cooling at all; interior is at room temperature, compressor not running, but interior light works.

Safety first: Unplug the freezer before accessing the compressor compartment. Components may be hot.

Step-by-step checks:

• 1. Listen for activity: Plug in briefly and listen for any hum or click from the compressor area. If silent, unplug and proceed.
• 2. Inspect start device: Remove the rear lower cover and the plastic cap on the compressor terminals. Check the start relay/PTC for burn marks or a burnt smell. Replace if suspect.
• 3. Test compressor windings: With all wires removed, measure resistance between the three compressor pins. You should see three finite readings; an open circuit or short to ground indicates a failed compressor.
• 4. Check control output: If start components and compressor test good, the main control board may not be energizing the compressor relay. This requires live voltage testing and is best handled by a technician.