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Replace sub-zero refrigeration twist-in style water filter

How to replace the water filter


Replace Sub-Zero Refrigeration Twist-In Style Water Filter


  • How to remove, install, or replace the water filter on a Sub-Zero?
  • Where is the water filter reset button and how to do reset after filter replacement?


How To Replace the Water Filter

water filter reset button, water filter

To replace a twist-in type water filter on a Sub-Zero product:

  1. Access the water filter by:
    • Classic (BI) or 648PRO models: Pull out on the bottom edge of the grille assembly and tilt the grille frame up.
    • Designer (IT, IC) 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.
    • Undercounter Ice Maker models: Open the door and find the filter on the bottom-left side.
    • All other Sub-Zero models do not have internal water filters. The situation depends on client’s chosen type of the home in-line water filter.
  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.
  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 models:After replacing the filter cartridge, press and hold the white filter reset button (to the left of the water filter on the front of the condenser cover) for five seconds to reset the water filter life monitor.

      water filter reset button, water filter
    • PRO 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 models:Tap Reset Filter if a filter is available to replace the existing filter.


      Click Yes to reset the filter life. Dot no disable the filter life timer if the internal unit water filter is used. label

  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 water filter cannot be removed or installed, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.