Try this:
FILTER - AIR FILTER ALERT -
Touch FILTER. The display will show the usage to date.
Touch FILTER for over 3 seconds and the display will change to LIMIT.
Touch arrows to set desired usage limit before filter alert comes on home screen.
When this limit is reached, FILTER will be on home screen and the CHECK FILTER indicator lights. Limit may be set from 0 to 999 days/99 weeks; default is 90 days/12 weeks. Touch to reset.
To reset the usage back to 0, touch usage number; touching it again restores the displayed usage.
Touch to return to the MENU screen
FILTER - AIR FILTER ALERT -
Touch FILTER. The display will show the usage to date.
Touch FILTER for over 3 seconds and the display will change to LIMIT.
Touch arrows to set desired usage limit before filter alert comes on home screen.
When this limit is reached, FILTER will be on home screen and the CHECK FILTER indicator lights. Limit may be set from 0 to 999 days/99 weeks; default is 90 days/12 weeks. Touch to reset.
To reset the usage back to 0, touch usage number; touching it again restores the displayed usage.
Touch to return to the MENU screen