Topics:

• How to remove, install, or replace the water filter 4204490 on a Classic series Sub-Zero?
• What is the replacement water filter part number for a 648PRO?
• How to replace the water filter in a Designer series Sub-Zero
• How to replace the water filter in a Professional Refrigeration (PRO3650, PRO4850) model
• How to remove a non-microbiological water filter, part # 4204490 or 7012975
• Where is the water filter reset button?

Answer:

How to Replace the Water Filter

1. Access the water filter by:
   • Classic (BI, CL), Professional (PRO3650, PRO4850), or 648PRO models: Pull out on the bottom edge of the grille assembly and tilt the grille frame up.
   • Designer (IT, IC, DET, DEC) Tall and Column models: Open the refrigerator door. At the top of the interior, pull out on the bottom edge of the water filter door panel and rotate up.
   • UC-15I Undercounter Ice Maker models: Open the door and find the filter on the bottom-left side. See Undercounter Ice Maker UC-15I Water Filter for more information.
   • All other Sub-Zero models do not have internal water filters. See Sub-Zero Does Not Come with a Water Filter for details.
2. To remove the old filter cartridge, rotate the cartridge counterclockwise one-quarter turn, and pull it out.
   • There is water in the filter cartridge, so it is normal for a small amount to spill out.
   • A jar opener can help provide a better grip for a hard-to-remove filter.
   • If it cannot be removed, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.
3. Remove the new filter cartridge from its packaging and carefully remove the plastic cap.
4. Insert the new filter into the manifold and turn clockwise until the filter is seated.
5. Reset the filter icon:
   • Classic (CL) models: See Classic Series (CL) Reset Water Filter. 
   • Classic (BI) models: After replacing the filter cartridge, press and hold the filter reset button (to the left of the water filter) for 5 seconds to reset the water filter life monitor.
     • Refer to Sub-Zero Classic Series (BI) Water Filter Replacement Indicator On for more information and a diagram of the water filter location.
   • Professional models: After replacing the filter cartridge, touch "Refresh" to reset the life indicator to 100%.
   • 648PRO models: Once the filter cartridge has been replaced, the control automatically resets. The water filter life monitor, and the "REPLACE FILTER" indicator will no longer appear.
   • Designer (DET, DEC) models: See Designer Series (DET, DEC) Reset Water Filter.
   • Designer (IT, IC) models: See Designer Series Reset Water Filter.
   • Reset Filter in Mobile App:
     • The water filter cannot be reset through the mobile app. 
     • For most Sub-Zero units, the filter life reading on the Sub-Zero Group Owner's App should automatically reset within a few hours of changing the filter. See also:
     • Sub-Zero Group Owner's App Water or Air Filter Life Incorrect
     • Sub-Zero Group Owner's App Refrigeration Alerts and Notifications
6. After the new filter cartridge is installed, discard the first full bucket of ice produced. This will help clean the water system and clear air from the line.
   • Allow 24 hours before discarding the first bucket of ice.
   • For dispenser models, the water line is typically purged before connecting to the unit. However, the first several glasses of water should be discarded after replacing the filter.
   • If the dispenser does not work after filter replacement, see Water Dispenser Not Working.
7. If the water filter cannot be removed or installed, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair. 

• The serial number of the unit is required to look up the appropriate filter.
• Refer to Sub-Zero Serial Tag Locations for help with finding the serial number on the unit.

• Order replacement water filters from the Sub-Zero Accessory Store or from a Factory Certified Parts Distributor.
• Canadian customers must order water filters by contacting a Factory Certified Parts Distributor.
• Refer to How to Purchase Water Filters and Air Filters for more information.

• Recycling Water Filters
• Water Filter Warranty
• Which Water Filter to Order

• Water Spraying from Filter
• Filter Needs Frequent Replacement
• Sub-Zero Group Owner's App Water or Air Filter Life Incorrect

• Sub-Zero Does Not Have a Water Filter for a list of which models use filters
• Refer to the product Use and Care Guide for further information.