For 2 years my pressure switch operated with no problems, now I can't seem to resolve my problems. My well pressure switch stopped turning on so I replaced it. Still didn't work correctly, so after deciding the gauge was stuck, I replaced the gauge also. Now it works for a few days then stops, requiring a little "tap" to get it running again. What is the correct way to replace a well pressure switch? Perhaps my own ignorance is the problem. It is a 30/50 switch, a 100 psi gauge, an air bladder tank. I didn't drain the tank when replacing the switch or gauge.