How can I remove "CHECK FILTER" from the LCD display?
Press and hold the SET button. While holding the SET button, press and hold the FILTER button. Release both buttons together. Press the down or up buttons to change the displayed number of hours of system “run time” you would like the CHECK FILTER reminder to reappear. Press the SET button to save the setting and to return to normal display mode. CHECK FILTER will be removed from the display.
| To View or Reset Filter Timer Settings: Push the button with the "i" three or four times to check the status (or remaining time) To reset while status still displayed push up or down on the time arrow to increase or decrease remaining time |
1891 Industrial Dr. 
