Imac 2011 very hot on back and top is this a problem?

The back of my iMac 2011 gets very hot at the top. It is almost too hot to keep my hand on it.

 

Is this normal or a problem?

 

fan doesn't make a noise.

My 2012 iMac is normally pretty warm but I can easily keep my hand on it.

There are vent holes on the bottom of the screen and some have holes on the back too.

UnPlug and vacuum to be sure. Un plug to avoid static charges, which can happen.

Cat/Dog hairs ? Dust for 6 years of use. Worth a try.

Never heard a fan here either.

By which temperature will the fan wil be activated and the second fan when he blows very hard.? And which temperature is normal when you working for example with Logic?

If your iMac is REALLY hot, you should be very concerned.

Running too hot can cause permanent damage.

If the vent ports are clear and it doesn’t run cooler, I would take it to an Apple store and have them test it.

I am not an expert and I don’t know what the temps. should be.

 

This Forum is more for help with Logic Pro and your heat issues will get more exposure over in the Apple Forums and you will get way more help over there, I am sure.

 

iMac - Official Apple Support Communities

 

Also, there’s a ton of information regarding these issues by just using google with “imac too hot”.

 

There used to be a few free utility Apps., like “smcFanControl” and a widget called “Fanny” that could help with these problems but, they don’t seem to work anymore with El Capitan or Sierra.

EDIT; CORRECTION, "smcFanControl" version 2.6 DOES work with El Capitan. It will show you your temps.

My iMac (Late 2012) temps say 133°F and 133°F @1400rpm

 

Sorry can’t be of more help.

Thanks!

has happened with my macbook pro. back it up, shut it down, leave it for a while. then reboot, go back to work. if it does get hot again... apple. if not, it could be a random moment, something trying to run the cpu at some crazy percentage.