I did some online research, and found the most common cause of my problem to be a bad Start-Dev Relay. I then looked on AppliancePartsPro website and found the part. Called customer service who agreed that to be the most common part failure to cause my issue, checked availability and decided to take a shot at it before replacing the refrigerator. The part arrived quickly, was the exact same part as the original, an online video showed how to replace it, and within a half hour the part was replaced, no more clicking and a couple hours later back to normal operating temperature. Thank you AppliancePartsPro for being so helpful and such a valuable resource.