Keeping the A/C filter in place

[DobeFanatic]

I am doing a shake down on my Flagstaff anticipating a trip in October. I recall the flimsy filter behind the a/c cover just being sucked out of the way when I ran the a/c. I took the cover off today and the piece is barely big enough to cover the cutoff under the bed wall inside the cover. Wondered if I could find a bigger piece of filter to use instead, or maybe just secure it somehow with twist ties inside the cover. Manual insists this filter must be in place or void the warranty and I have dogs/hair/camp dust so what is everyone else doing about it??

[CHICKDOE]

are you talking about the thin foam filter goes into the a/c return air register? I was missing this on one of my air returns. went to camping world and they sell a sheet of the material (maybe 2ft by 3ft) that you can cut to size with a scissors. it cost a couple of bucks.

[DobeFanatic]

The problem is the air flow sucks the filter out of place, it is very flexible.
I may check Home Depot, maybe try to set up strips of velcro so I can remove the filter for cleaning now and then. It is no fun unscrewing about 12 screws to get the main cover off every time the filter slipped out of place. Maybe put the cover on velcro too! Poor design.