I disassembled much of the base and my s9, found no obvious problems. Take action to fix a suspected seal problem with these steps. Safety first, always turn it off. Look for cracks or breaks on the seal. Dirt can cause gaps, so clean it thoroughly.
If it’s too high, the bag is full, or the line to the roomba is clogged. If it’s too low, then there is a leak in the vacuum system somewhere. Maybe the bag is not sealing or seated correctly.
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