Freezer not cooling at all; the interior is warm, the compressor is not running, but lights may still work.

Safety first: Unplug the freezer before accessing the compressor or controls. Sealed system work should only be performed by a certified technician.

• Listen for the compressor: Plug in the unit and listen for a humming sound followed by a click. Repeated clicking every few minutes suggests a start device issue.
• Check the temperature control: On mechanical dial models, turn the thermostat from OFF to the coldest setting and listen for a click. If there is no click and no power to the compressor, replace the thermostat.
• Inspect the start device: Remove the rear access panel, take off the compressor terminal cover, and inspect the start relay/overload for burns or rattling pieces. Replace it with the correct Whirlpool kit if it is suspect.
• Test the compressor windings: With the start device removed and power off, measure resistance between the compressor terminals. If the windings are open or shorted to ground, the compressor has failed and requires professional replacement.
• Check the control board: If mechanical parts test good but the compressor never receives power, the main control board may be defective and should be replaced.