On Saturday, June 5, 2021 at 8:02:12 AM UTC-5, dan wrote:
Lately the water pressure pump keeps turning on frequently.
Like every half hour.

And it stays on for a long time.
I thought there was a leak somewhere of water.

So last night I turned off that booster pump at the circuit breaker.
I expected no water pressure in the morning.

And yet this morning there was plenty of water pressure.
What else could cause the water pump to be constantly cycling on?

Do you know what the pressure readings are when it kicks on and
when it kicks off?
You called it a booster pump. That implies that there is another pump
ahead of it. Is that right?
Is it pumping air? My first off the wall guess would be a pressure switch
malfunction.