I am stumped as to cause. I can't see a thermal overload happening in
1 sec run time. Overload trip due to shot pump bearings, something
nearly seized up? I would say there is something seriously wrong
with the pump and it needs to be pulled.

Well, again, WTF trips the pump off?

If you trust yourself not to get electrocuted, you might pull the cover off
the pressure switch and, at first, just object the operation. If it clicks
ON and then clicks OFF after a second then, like it or not, you have a
"situation."



Harry K