$16 cabin filter, OE or aftermarket (whichever is cheaper) every year or every 15K miles is cheap enough insurance so that I can breathe clean as when new and my A/C will thank me for it.
Yes the A/C
Light does flash when the cabin filter is clogged beyond use.
There have been posts elsewhere discussing washing them.
This Cabin filter is more refined compared to a washable ShopVac filter.
I would not even attempt it. They are flimsey enough, before hitting it with
mild soap and water.
I could envision a
washed/air dried cabin filter disintegrating into pieces at some point and getting sucked into the A/C duct and fan.
It's just not a washable media type filter.