# How to Reset the Lux Counter
Once you replace the filter in your furnace system, you must reset the counter on your Lux thermostat. The Lux thermostat has a counter to remind you when the furnace filter requires replacement. Replacement filters have different life expectancies such as 30-day, 60-day and 90-day filters. The counter should be reset to 240 hours for every 30 days of filter life. Resetting the Lux counter helps ensure filter replacement in a timely manner.
Instructions
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1
Touch the “Menu” icon on the Lux thermostat display screen. This displays the “Scroll” menu icon. Press and release the “Scroll” icon until the menu displays “Filter Usage” and press the “Yes” icon.
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2
Press the “Yes” icon once again when the “Filter Usage Count” icon appears. Press the “Next” icon to display “Reset.”
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3
Touch the “Yes” icon again to reset the counter. The display will illuminate the “Filter Limit Menu.” The directional icons also appear.
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4
Press the directional arrows up or down to the desired filter count setting. Adjust the counter to the life cycle of the filter. Set the counter to 240 for a 30-day filter or 480 for a 60-day filter.
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5
Touch the “Yes” icon to accept the new count and press the “Exit” icon to return to the main menu.
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