Think I need a new pump, but before I go through that I thought I'd check here. Info: 125' Well with submersible pump and external controller. 35gal pressure tank inline sediment filter. 230v 1/2hp Franklin pump. Problem: Suddenly during a storm we lost water pressure at all the fixtures in the house. Not a total loss, just very low flow on the main floor and almost no flow on second floor (toilet wont refill). Trouble Shooting: I figured that we had a clogged pipe somewhere as we have very hard water, and the existing plumbing was insane, the area above the water heater looked like a screenshot from the windows pipes screensaver. So replumbed about 24-30' of 1/2 copper which I planned to do anyhow. Nope, no change. Changed sediment filter, nope not it. Okay, next I tested the pressure switch and confirmed about 35psi on pressure tank, but the tank was obviously empty. All good, noticed the pressure gauge was stuck at 70psi. So I replaced it, now we are getting somewhere. 12psi steady, with all taps open or closed no change. Left for an hour or so, needle didn't budge. Confirmed voltage to controller. Changed water pipe feeding pressure switch..well...kinda broke it off so had to replace it. 'T' at tank not plugged. Drained all pressure with pump off, turn everything off, turn pump on an almost immediately goes to 12psi no higher. Okay, pressurized pipes to 30psi, and watched. Doesn't drop after an hour, and takes a few minutes to reduce it back to 12psi with a tap open, so pressure tank is doin it's thing. Turned pump on, opened well cap, no leaks at pitless, also didn't hear anything. Although I doubt you are supposed to. Theories: control box is stuck on start mode, as i noticed the capacitor seems to have leaked a bit, although testing voltage drop appears normal. Or impeller is wore out and pump just can't make it up to pressure. Anyone else have any guesses.