Out of nothing, my MagSafe to MagSafe2 converter became extremely hot while charging. So hot, I could not even touch it.
What could cause it?
I've been using it so I can leave multiple old 85W MagSafe chargers at various places, so I plug my new late 2013 15" Retina MacBook Pro without having to bring a charger.
Edit:
After inspecting for discoloured parts, I saw the flat side of the aluminium surface is a bit discoloured.
This is what I've done after it got hot:
- I cleaned everything a couple of times with finger nails and a wooden toothpick (to prevent scratching: electric stuff doesn't like metal fragments).
- The connector kept getting hot.
- After turning the connector 180 degrees, it kept cold. If I turned the power plug 180 degrees or 360 degrees, it stays cool too.
Turning 180 degrees was suggested below by mbabineau and seems to fix the issue every time this happens.
Best Answer
I also found that spinning it around, 180 degrees, fixed the issue. Not sure why but looking at the female side of the adapter it seems two of the connector pins on one side are closer than on the other side. I also maybe hallucinating.