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A1418 / EMC 3069 / 2017 / 3.0 GHz quad-core i5, 3.4 GHz quad-core i5 or 3.6 GHz quad-core i7 Processor. Released June 8, 2017.

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iMac is overheating. Why?

Hi,

FOR SOME REASON MY IMAC RETINA 4K 21.5 2017 IS OVERHEATING. I USE IT ON MY TIME OFF ALSO IVE MOVE IT FORWARD FROM THE WALL AND CLEA UP THE VENT. I DOSENT HAVE WARRANTY ALREADY EXPIRED.

NEED ADVICE.

THANKS

ROBERT

Answered! View the answer I have this problem too

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@yankee98 There are usually two reasons a computer overheats. One is dust clogging up the fan, the second is thermal paste needing replacement which involves removing the heatsink.

Given that your Mac is relatively new, most likely the dust is the problem.

The bad news is this Mac will take an extensive amount of labour to reach the heatsink and fan because of its design. The good news is that ifixit guides are available for you to refer to.

You can remove the fan to clean any visible dust, but it may need replacing if badly clogged.

I would also recommend redoing the thermal paste when the computer is already opened, the process of which is linked at the bottom of the heat sink guide.

Here's the Heat sink guide and Fan guide.

iMac Intel 21.5" Retina 4K Display (2017) Fan Image

Guide

iMac Intel 21.5" Retina 4K Display (2017) Fan Replacement

Difficulty:

Moderate

iMac Intel 21.5" Retina 4K Display (2017) Heat Sink Image

Guide

iMac Intel 21.5" Retina 4K Display (2017) Heat Sink Replacement

Difficulty:

Moderate

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2 Comments:

Thank You. Do I need a computer vacuum to do this work?

I like this challenge hope I can fix it.

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Nope you don't need a vacuum.

You just need a small watercolor brush to brush off the dirt on the fan, or a replacement fan if the old one is too severely clogged and you can't reach the dirt.

Be gentle when you brush, fan blades can break if you use too much force.

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Well this might be helpful for you if you looking for a reason of overheating mac: https://www.bestmactools.com/macbook-pro...

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