Had mine come on, and stay on after I changed both filters. I bought the kit, to change out the gasket and the WIF Switch... Never needed it. Alarm stopped... I still drain the WIF drain regularly, but alarm never came on again. I still have all the parts I need to change the switch. I'll keep it, as I have a couple 6.4s, and this is likely to become a problem until I switch the other LPFP out for AirDogs.... The kit, should you need it, is 125 (ish) bucks from ford. If you remove your driveshaft, everything is easy access.