I have about a 18 year old Red Jacket QuickSet Jet well pump model 60RJ 1/2 hp. It sits on top of about a 10 gallon pressure tank. I have a about a 15 to 20 feet deep dug well. Last night after my wife did a couple loads of wash I noticed that the pump was running continuously. I checked the pressure gauge and it was at about 38 lbs. I turned the pump off and ran some water to verify the gauge was working (it was), turned the pump back on and the gauge came back up, and we have water pressure so long as the pump's running. It has a pumptrol pressure switch, which I'm not all that familiar with, so with the pump running I tried turning but nuts on it both clockwise and counterclockwise with no results (pump continues to run). I'm sure that I don't have any leaks or water running anywhere, and the gauge holds pressure overnight (may lose a couple pounds) so I don't think it's a foot valve issue. Any ideas, suggestions, or other tests I can try?