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Old 08-08-2019, 11:53 PM   #3
IronCanine
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Join Date: Oct 2013
Location: Athens, GA
Posts: 2,874
Re: Red A/C box assembly mark

Thanks for the insight Jim. I must confess, I have a weakness for the graffiti. But the idea that it could be a "spot check" mark would be consistent with the fact that I've seen many more without than with. "This unit is charged" seems like the most obvious explanation as well.
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