I have a 4" deep well, jet I think,with an AO water tank, system was installed about 12 years ago, been no problems till now, pump will run for a few minutes then turn off for a few then back on. My gauge is showing about 32 and doesnt move, my water tank is empty with approx32-34 psi, I have water at the faucets ok. I turn the water off to the house and pump still cycles off and on. Any help??