My son has a leaking pressure switch on his well pump (240V). The switch is SquareD. Just now he found water coming from the switch. He has turned off power, and has headed off to HD to get a replacement.
We have not experienced this before and felt that replacing the whole unit was best. HD closes in an hour so it's a matter of getting a unit and replace.
My question is is there any specific cause other than a leak of some sort on the diaphragm. It isn't rusted out, but there is water in the box as well.