Had a pipe freez in my shop sink. Replaced the copper, turned the pump back on and heard water running, Looked in the crawl space and there was water gushing out of the pressure tank. The pressure guage had corroded and broke, and the reliefe valve was dumping water. Replaced both of them (parts were very inexpensive) Fired it back up and the new reliefe valve was still dumping water. Took it back off, took it apart and cleaned some debris out of the seat area, put it back on the tank and no leak, but the guage shot up over 100 PSI and stayed there. Never saw the switch cut on or off. Typical plumbing project.
Question? is there a way to test the pressure switch? New one is less than $30 and I"m tempted to just replace it that way everything will be new. I would prefer to not have to crawl back under there any time soon. Any ideas? Could the switch being stuck damage the other two?