When I was down digging in my cellar, I kept hearing the pump kick on, then one second later or less kick off. It bewildered me, but I didn't give a very much thought, until Carol was washing some radishes that we were going to have for dinner. I heard it come on, then almost immediately I heard it turn off! It confused me because it is a whole new system, actually new motor, rebuilt pump as good as or better than new. I had an empty 2 & 1/2 gallon bucket, so filled it, listening to the pump do the same thing. I discovered the 88 gallon pressure tank was virtually empty. What happened was that because of our hot weather the sun had heated the tank, metal, water, bladder, and air until it had increased the air pressure to over 50 pounds, and it squeezed all the water out of the tank. The only water was in the pipe and it was like having no pressure tank at all. We turned the electricity off going to the motor, ran out the little bit of water in the pipes, and then released all the air pressure except for 28 pounds, which is what it is supposed to have in it, and turned the pump back on, filling the pressure tank, and now it should work okay, even with it being so hot. When it cools off the pressure may be lower than it should be, but that will not be a problem, and I will have the whole system in the cellar before long where there will not be huge temperature swings! I pumped air into the tank at night, bringing the pressure to 28 pounds, and it worked okay as long as there was cold water in the tank, but once that water heated, because we do not use that much water, then it changed the air pressure and made the pressure tank so that it didn't even work! I knew about pressure changes with temperature changes, but I never thought it would be that drastic! Live and learn!