Unit asking for water filter change

old question but just for completion sake @legend147 you may not have that filter as an accessory. Your brewer will indicate “Time to replace the Water Filter.” after every 1,000 ounces or two months. You can disable the water filter reminder in the settings menu. The only other filter (but no reminder) that your Keurig has is in the bottom of the reservoir. It’s a simple mesh screen Step 4 in this guide shows it even so it is a different model, your Keurig has that as well. How to open and clean Keurig Coffee Maker