So how do you reset the pressure switch, I'm rather weak on a pumptech?
I you ean you operate a mechanical lever on the side of the switch, I suggest the well is going 'dry'and the pump is sucking air causing the pressure to fall and the switch opens on the loss of pressure; as designed. Serious water conservation would be a good idea then.
If you mean you push a button on an electronic pump controller, the pumptech, then call the pump guy and get his take on this no water problem before the new one quits. And if he finds something else wrong, have him reinstall the old one or work something out as a spare.