The pressure switch was replaced 6 months ago.my above-ground 1/2hp pump with 5gal ps tank mounted above it runs continuously water ps. Up and down 1/2the time waiting on water to return help this worn-out roofer fix proublem...

First off. LOSE THE CAPS! We don't yell at people in here.
What's the recharge PSI in your bladder tank? Are you saying that when it runs continuously that you get water but it never builds enough pressure to shut down? If that's the case how high does the PSI get up to? The pump keeps its prime correct? Let me have all the details that you have. Back to you, Tom