I'm not sure where to start troubleshooting this, so I thought you guys could probably help.
Yesterday, my wife noticed that he hot tub was off. I had her check the service panel breaker and it was tripped. Problem is is won't turn back on, just immediately goes back to the middle tripped position. We've had this hot tub working fime for about 3 years, so I'm not sure what the problem suddenly is.
Here's some background that may help:
I have a 50A breaker in my main panel running to a sevice panel by the hot tub which has a 50A GFCI breaker. Wiring goes directly to the hot tub from the GFCI. When I manually turn off the 50A breaker in the main panel, the GFCI in the service panel will stay on, but when I turn the one in the main panel back on, the one in the servce panel immediately trips. Last summer, I noticed that the breaker in the service panel would trip occasionally, but never could pinpoint when. At the time I guessed it may have been when the air conditioning was running, but since they are on completely diferent circuits, couldn't see a plausible connection. Now that this has happened, I doubt the air conditioning has anything to do with it. Up until last summer, the breaker never tripped once.
Where should I start looking? Bad breaker? Wiring from main panel to service panel? service panel to hot tub? hot tub itself? Hopefully this information leads one of you experts to an obvious problem, but I'm willing to look at anything, just need to know where to start. Thanks, guys/gals. I know you won't let me down!