Water Pump Too Loud?

Well, I finally figured out why the pump kept running and sounding weird. Actually, my father figured it out. Never too old to get schooled by your parents. But I sure feel stupid about it. Seems there's a switch by the hose connection that you flip to "Fill" when you want to fill the water tank. And you flip it to "Normal Use" when you're connected to the water line. I thought you only use that selection when you have the hose hooked up. Nope. Dad walked right over and flipped it to Normal Use and the pump stopped. Then he looked at me at went "Duh". Gee, thanks Dad.