Hi all, I’m moving into this historic house and see this around the ac unit. I don’t notice mold anywhere else. Does possible mold around the ac indicate a mold problem in the home or just poor sealing of the window unit? I’m in florida where it is quite humid outside.

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In Florida it's easy for things to get some mold or mildew as you know.

From the picture, it looks like a minor amount, if it is mold. It very well can be crumbs from the black foam sealing strip. Either way, there is nothing showing there that indicates a mold problem.

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