Sub-Zero Pure Air Icon Flashing
Topics:
- Air purification icon, pure air icon, or air filter icon is missing, on display, shown, flashing, blinking
- How do you turn PURE AIR on or off or reset the air purification icon?
- Reset filter life on Sub-Zero Group Owner's App
- How often should the air purification cartridge be replaced?
- How long should the air filter last?
- Is it harmful to the Classic (BI) unit if the air filter is not replaced?
Answer:
Pure Air Information
The Pure Air icon flashes when the air cartridge needs to be replaced.
- This occurs after 365 days of use while the unit is on and the air filter is on.
- This occurs earlier if the bulb inside the cartridge burns out.
No harm will be done to the Sub-Zero unit if the air filter is not replaced or not used.

Pure Air Icon Is Flashing
Purchase Replacement Filter
To purchase a replacement filter, see How to Purchase Air Filters.
If the Pure Air icon flashes intermittently, refer to the product-specific instructions to replace the filter and to stop the Pure Air icon flashing:
- Classic Series Air Filter Replacement and Reset
- PRO Series Air Filter Replacement and Reset
- Designer Series Air Filter Replacement
- Designer Series Reset Air Filter
Reset Filter Life on Sub-Zero Group Owner's 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:
Additional Resources
- How to Use the Sub-Zero Air Purification System includes information on what the filter removes and how it works
- Sub-Zero Serial Tag Locations includes information on serial tag location to identify appliance model
- Air Filter Disposal
- Sub-Zero Beeping
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