Sub-Zero Pure Air Icon Flashing


  • 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?
  • 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?


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, or if the bulb inside the cartridge burns out.

Pure Air Icon Is Flashing

If the Pure Air icon flashes intermittently, replace the air filter, and then press and hold the Pure Air control for five seconds to reset the timer.

See product-specific instructions to replace the filter and to stop the Pure Air icon flashing:

For instructions on purchasing a replacement filter, see How to Purchase Air Filters.

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