We have a 2002 Eagle and our panel doesn't work so I cannot go by that. Our tank however is under the couch so I can just watch it fill. When we have about half a tank I usually turn on the pump and turn the faucets on to get the air out and get the water heater tank filled. This gives us another 6 gallons then we just continue to fill until we hear water coming out under the camper. This means that it has hit the overflow. I guess that is how we do it, right or wrong, works for us.
David, Darla, Dawson, Dessa, Doogie the Doggie & Daphne the Camper
2002 Jayco Eagle SE 304bh