there is a control box located at the tank next to a pressure guage. here is what you need to do. note the pressure reading on the gauge it should be around 20 psi shut off the power to the well pump. remove the cover from the control box. you will see 2 adjustment screws one is longer than the other. turn the shorter one clock wise 2 full turns. now have someone turn on the power to the well pump while you watch the guage. you should hear the control box click and the pressure rise a little higher. if it does not click and or the pressure does not rise. carefully turn the short screw clockwise again until you hear the click or see the pressure rise. this will also make the shut off point at a higher pressure. to resolve that you must turn the longer screw counter clockwise. to observe your adjustment you will need someone to turn on a faucet. when they do this the pressure will drop until it reaches the new adjusted pressure (should not be more than 40 psi)when it reaches the new pressure you will hear a click and the pressure should stop falling. at this point have your helper shut off the faucet. you will see the pressure rise. if it goes higher than 65 psi turn the long screw counter clock wise a little more. and have your helper do the faucet procedure again. just a 10 psi difference in kick on pressure should be enough. when you have completed the adjustment. turn off the power, replace the cover then turn the power back on. your done

On a square D pressure switch, there are two adjustment nuts. The smaller offset nut controls the differental between off and on. The larger, center nut controls your off/on pressure setting. Turn the larger nut clockwise for greater on/off pressure. Every complete revolution adjusts about 2psi. You should never adjust the smaller nut since a standard switch has a 20 pound differential which is fine for household use. Keep in mind that if you have a bladder type tank, you may need to adjust the air in the tank as well. Example, you have a 20/40 switch. Turn the large nut 5 complete revolutions to create a 30/50 pound switch. Remember that most submersible pumps use 220 and both sides of the switch are hot. If you do not feel comfortable, call a licensed professional. Most won't even charge you a service call for a simple adjustment such as this.

gee, if that dont work then why does mine? and i'll ad for the past 4 years! WILL NOT DAMAGE THE PUMP. it might work a little harder but it will not over heat!