The small box on the air conditioning filter is a small device for sterilization, the new air conditioning factory generally has a shelf life of about two or three months, in fact, it is a gimmick of the manufacturer, it is recommended to take it down after dirty and throw it away, and it is not useful after cleaning, but it is easy to breed germs.
< br >
① Turn the inner machine \"fringe\" over, push the filter from the bottom up, and pull the filter down after the lower end of the filter card is removed (generally two pieces); ② Wash with cold water first, wet the filter (so that the dust will not fly after the wet water filters the net), and then use a brush or a shoe brush to scrub; ③ Wash the clean filter, shake the hand, shake off the excess water, ④ the clean filter is directly installed back to the inner machine.
Those two things, is to purify the air, adsorption of harmful substances, can not be washed, after washing there is no effect. But when you wash it, it doesn't make a sound. It should be caused by the filter screen is not installed in place, open the boot cover and reinstall the filter screen.