Pressure Switch Problem ( I think )

I have a 3/4 hp jetpump on an outdoor well used for the lawn ( 3 years old ). Last week I had a sprinkler system installed. After running thru 6 zones, the pump is refusing to shut off on 3 of 7 days so far. On those days it sounds as if the bladder tank is not filling. After opening up a spicket on top of the pump and closing it several times, the tank will fill and the pressure switch will kick off. The installer has adjusted the pressure switch twice.

Any suggestions

Additional info: Expansion tank has pre pressure of 40psi and a max of 150. The tank with the pump off is 54psi

Read the instructions here for adjusting the air pressure in the tank and then let us know how things turn out-

https://terrylove.com/forums/showthread.php?20849-Pressure-Tank-Maintenance

10-4. Will advise.

Sounds like you have an air leak in the suction line.

Bladder tank was problem

I trsted the tank as directed and found it was at 34 psi. I pumped it to 48 and the problem was resolved. Thanks.

OK but that doesn't have anything to do with the pump not shutting off. And 48 PSI air in the tank is too much unless your pressure switch works at 50/70.