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. Check the green flap in the dust bin of the roomba is not clogged or folded over. Take action to fix a suspected seal problem with these steps.
Look for cracks or breaks on the seal. One common problem that frustrates many roomba owners is a sudden loss of suction power.
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