Well, glad I decided to keep my 15-40 Circuit when I installed my HPWC (about a year ago). Last night my car was charging, happened to look at my App and it said the car wasn't charging with 150 miles of range, and it said to check the charge cable (I forget the exact words). Went out to the garage and HPWC was dark. Check circuit breaker -- fine. Tried reset button, nothing. Popped the panel open and things looked OK (this was at 11pm) so i figured I'd hook up the 14-50 and dig deeper this morning. Looking this morning there are melt point and burn marks inside the box. Touching what I could with a meter, I was able to tell that power is still coming in fine, going through the front fuse fine, but stops as it goes behind the box on top -- and you can see burn marks on the paper that surrounds it. A few wavy melty plastic spots there as well. The way things are melted it looks like it may have happened over time vs just a sudden blast, but difficult to tell. Tesla has said they are sending me a new one, but just curious if anyone else has had this. And for new owners installing a HPWC, I think it's worth it to have a 15-40 as a backup power source "just in case." Yes it's been a year with no issues, but it sure would be a pain for these few days without a way to charge (we are nowhere near a Supercharger.