Freezer and refrigerator not cooling

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Brand: Kitchen Aid
Model Number: KSCS25FKSS00
Main Symptom: won’t cool
What happens & when: no cooling

Error Code (if any):
Parts or tests already tried: cleaned coils, verified lights and fans work, tested defrost timer
Photos / video link:

Does the compressor operate at all? If not, but the condenser fan is operating, the inverter would need to be tested for incoming voltage. There should be 120 Volts AC when testing the two thick wires, and 4 to 12 Volts DC when testing the thin wires. If voltage is present and the inverter does not have a blinking light, the inverter would be the likely cause of failure. W10629033 Refrigerator Inverter Control Board | Genuine Whirlpool OEM In Stock