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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:

  1. I cleaned everything a couple of times with finger nails and a wooden toothpick (to prevent scratching: electric stuff doesn't like metal fragments).
  2. The connector kept getting hot.
  3. After turning the connector 180 degrees, it kept cold. If I turned the power plug 180 degrees or 360 degrees, it stays cool too.

I presume it is for a new converter.

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It is broken and will die a horrible dead soon :) actually it should be RT like all the time. Check the pins to see if one of them is getting discolored. –  Buscar웃 Feb 27 at 16:17
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RT= room temperature :), the only reson for it to get hot is a bad contact creating a arc, that creates heat. –  Buscar웃 Feb 27 at 16:54
    
OK, if it is not hot by now then it worked ! –  Buscar웃 Feb 27 at 17:28
    
I would call that one solved. Getting a new plug might be a good idea. –  Buscar웃 Feb 27 at 17:34
    
chat did not work for me, sorry have to go and make dinner :) –  Buscar웃 Feb 27 at 17:55
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1 Answer 1

up vote 2 down vote accepted

Actually it should be RT (room temperature) like all the time.

Check the pins to see if one of them is getting discolored.

The only reson for your converter to get hot is a bad contact creating a arc, that creates heat.

Making sure the plugs sit tight (on both sides) and that none of the contact pins (on both sides) is discolored. Cleaning the pins could not harm.

Ultimately getting a new converter would be a good idea.

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