I'm hoping to revive this thread because mine is driving me crazy. Wondering if anyone has figured it out or found a fix. I notice it more when I lower the temp. The colder the fridge, the more popping I hear. It does seem to happen not once, but twice after compressor cycles. The second pop is always much louder.
It is an Avanti kegerator with plate located along the back wall. I purchased it used on craigslist so I don't have any info or even know how old it is.