It sounds like you made coffee, but might not have had enough grounds in the filter for a full pot, and was subsequently a diluted version. Try using different ratio of grounds to a full pot of water. Also, depending on the brand of coffee you use, there may be a basic table of proportions to follow.
Here's the operating manual: http://www.bunn.com/sites/default/files/discontinued_manuals/10860.0000.pdf.
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