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New SubZero Icemaker (universal Supco) mechanical dial swings back and forth? Not just clockwise

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SubZero 590.  Replaced ice maker about 3 years ago.  Worked great, got lots of use.  Found it was no longer making ice, bought replacement.  Worked great for about 2 days, then strange issues.


When I do a test cycle, the dial seem "caught" in one position and does this back and forth motion.


Is the 2 day old ice maker defective?


Also, the water valve does not seem to activate when I test at the test points.


Thank you for the help.

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