Spent the weekend on the old girl and found/created a problem. My freshwater pump was running when I left for a couple hours, didn't think anything about untilI came back and it was still running. I check my water level and it was low. I filled the tank in the dark. Filled it until water sprayed from the vent and also out the fill opening. Capped it and turned the pump back on. Everything work as expected except now the pump wont shut off. Any ideas? Oh....its a 1986 Sundancer