iMac switching off

[pemimo]

Hi All,

I have a Late 2015 27' iMac. Unfortunately it has started crashing/turning off when it gets hot. It will not re-start unless I remove the power plug. If I do that and the start it up whilst it's still warm it cuts out after about 5 minutes, if I leave it to cool down it's fine for about half an hour.

It doesn't switch off if I put it in 'sleep' mode when it gets warm, and then leave it to cool down.

Is there anything I can do, or does it have to go back to Apple?

Thanks

Peter

 

[ferrarr]

Is there anything I can do, or does it have to go back to Apple?

That depends on your comfort level.

It sounds as though one (or both) of the fans in your Mac aren't working properly. It could be as easy as dust in the intake/exhaust vents, or maybe it/they've died. You may be run Apple Diagnostics,

Use Apple Diagnostics to test your Mac - Apple Support

Apple Diagnostics, formerly known as Apple Hardware Test, can check your Mac for hardware issues.

support.apple.com

Or you can look at your Macs temperatures. See this article,

How to check your Mac's internal temperature and keep it cool

When the weather heats up, you need to pay attention to the heat your Mac creates.

www.macworld.com

 

[Rod]

Certainly worth checking your running Temperature. I use Mac Fans Control Macs Fan Control - control fans on Apple computers, also on Windows via Boot Camp

It's worth checking if it really is a temp problem because both myself and one of our other members have 2015 MBP's which display similar behaviour.
This is a fairly recent occurrence and I know our fans are working fine, mine was replaced a month before this started happening.

 

[chscag]

That model iMac only has one fan. But certainly good advice from Bob about running diagnostics and checking the bottom vents to make sure they are not clogged.