Refrigerator not cooling at all, both freezer and fresh food sections warm, lights work but no cooling.

Safety First: Unplug the refrigerator before touching the compressor or electrical components.

Steps:

• Listen for compressor: Plug in the unit and listen at the back. A repeated clicking sound with no steady hum often indicates a bad start relay.
• Test start relay: Remove the start relay and overload from the compressor terminals. Shake the relay; if it rattles or shows burn marks, replace it with the correct Whirlpool OEM part.
• Check compressor windings: With the relay removed and power disconnected, measure resistance between compressor terminals. Infinite or shorted readings indicate a bad compressor.
• Verify control output: If the compressor and start device test good but never receive power, the main control board may be defective and require replacement.
• Compressor replacement involves sealed system work and should be performed by an EPA-certified technician.