Welcome to iRV2.
Could you add the year of your RV to the post .
Brand new unit or new to you ? Could this have been a problem right from the factory?
Maybe a moderator can move your post over to the " Owners " forums , where more owners of RV' s from your manufacturer will see it.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.