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TO RESET THE FILTER USAGE COUNTER: Move the Set Slide switch to the "AIR FILTER" position. The three small digits at the bottom of the screen tell you the quantity of filter days remaining. Pressing the NEXT button will toggle the display between showing the days remaining as a number, or a graphical precentage [sic] remaining using the vertical bar graph. Press both the UP and DOWN buttons together at the same time, and the usage counter will return to the beginning of the value that it originally started counting from. Refer to the previous paragraph, should you wish to hange the starting value for the filter monitor. Return the Set Slide switch to the RUN position when you are finished.
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