Levoit LV-PUR131 Air Purifier True HEPA Filter for Sale in Irvine, CA - OfferUp

What is this red symbol telling me on top of my Levoit PUR131? It's been blinking nonstop. I've changed the filter and I've pressed the reset button. I can't find what this

Levoit LV-PUR131 Air Purifiers for sale

Hepa purifier for sale - New and Used - OfferUp

Hepa purifier for sale - New and Used - OfferUp

Levoit Air Purifier Replacement Filter LV-PUR131-RF, Genuine, 1 Pack

Levoit Personal True HEPA Air Purifier - White

This Levoit Air Purifier Is on Sale for Just $68 at

Levoit Personal True HEPA Air Purifier - White

Hepa purifier for sale - New and Used - OfferUp

LEVOIT 300 Series 3-Stage True HEPA Pet Allergy Replacement Filter HEACAFLVNUS0014 - The Home Depot

Levoit LV-PUR131 True HEPA Air Purifier

Levoit 4-Speed White True HEPA Air Purifier ENERGY STAR (Covers: 290-sq ft) in the Air Purifiers department at

Levoit True HEPA Air Purifier for Sale in El Dorado Hills, CA - OfferUp

Hepa purifier for sale - New and Used - OfferUp