run water in a sink using the pump and see if you can follow the pump noise, the filters are usually very close to the pump. this is how I found mine it was behind a panel below the fridge, I don't have a unit like yours but just a thought to try.
Dale & Terri, Lulu & Tiki (our Chihuahua's), New rescue puppy Prince - Pom/Pug mix.
2013 Tundra, Double Cab, 5.7, TRD Off-Road, 4X4, Full Tow Package
2013 Wildwood T26TBSS - Sold
2000 Gulf Stream Sun Voyager M-8357 MH, Ford Trident V10 Gasser, 35 foot.