FY2422 & FY2420 HEPA Filter for PHILIPS AC2889 AC2887 AC3829 AC2882 Air Purifier
1．With the air purifier off, unplug the air purifier and remove the back cover. 6．Plug in and turn on the air purifier. Use a pen or a pencil to press the black reset button inside the vent on the side of the air purifier.