What does the water filter status indicator light mean?

The filter status indicator shows three conditions: Green means the filter is still operating within its specified life cycle; Amber indicates the filter has reached approximately 80% of its useful life and this is the recommended time to purchase a replacement filter; Red means the filter is 100% used up and should be changed as soon as possible. After changing the filter cartridge, press and hold the Filter Reset button for 10-15 seconds until the lights flash. (Page 14)