I used to know what the issue is, but it has been over 2 decades and I'm not certain; however, it seems like the real problem was at the interface where the Al wires tied into the Cu feeds? Maybe dielectric induced corrosion? Of course, the compatible interfaces are out there, but many electricians are either unaware or simply don't want to have to make the extra effort to get the "non-standard" interface pads!\nSame with me. I had to look up what the bruhaha was about since I'd forgotten. I had a home inspected once because we were afraid it had aluminum wire. It did not. That's about the only thing that wasn't wrong with that home.\nMy place was built in 1946 and has Aluminum- I'll be glad to sell it.\nI hear you. Its like having a home built on an indian burial ground. Its probably not going to bite you given you've gotten this far. But at re-sale time who knows what will rise up and kill off some equity value?\n\nAluminum wiring is an interesting discussion. There's a punchline here somewhere for the snake oil cable and replacement A\/C cable people. I just can't quite put it together in my head. Sigh.