It could be a broken water line from the well to the house usually you ll have a wet area between the well head and the house a bad check valve just above the submersible pump at the bottom of the well a bad connector leaving the well casing or even a broken water line inside the well casing.
Well pump check valve leaking.
Check your water supply from the well along with any leaks which could be affecting your pressure cut off.
This is called intermittent pump cycling.
If the system was just above the turn on pressure when the water was last used and an ice cube maker ran or toilet leaked a bit the pump would run.
If the pump motor starts too often that could be indicating something wrong with one of the following pieces of equipment.
A leaky foot valve or check valve allows water to drain slowly down the well piping and flow back into the well.
Low water pressure can have many causes but most commonly can mean a failing well pump stuck check valve partially closed or bad ball valve or leaking failing pressure tank.
Is the check valve or foot valve leaking.
Pressure switch check your se.
The house was pre existing but i really question the ability of the pump to hold the pressure in let alone to not have any small leaks in the piping all the way up from the well in the ground.
Switch won t turn on or off if the well water pump isn t creating the appropriate pressure it won t signal your pressure switch to turn off and on.
Water pressure is low.
Change a foot valve on a shallow well.
The check valve or foot valve is leaking.
Each of these problems requires a pro.
Sand will wear out the pump valves and fill up the bottom of the well.
The water is leaking from the system somewhere.