my macbook pro gets very hot when charging

my macbook pro gets very hot when charging, and idea's? also im not sure if the fan is working?

MacBook Pro (13-inch Early 2011), Mac OS X (10.7.3)

Posted on Apr 2, 2012 5:53 AM

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13 replies

Apr 2, 2012 6:01 AM in response to tildaturtle

Charging generates heat tht is not produced when charging isn't taking place, so higher temps during charging are normal.


Download and install iStat Pro, which will tell you the actual temperatures of many parts of your computer and also the speed at which its fan is spinning. Post back when you have that information.


http://islayer.com/apps/istatpro/


Be aware also that if your machine approaches a temperature at which it could be harmed, it will shut down for its own protection.

Apr 2, 2012 6:33 AM in response to tildaturtle

Right now my MBP is basically doning nothing, I am typing this from my Win PC desktop and my MBP is sitting on my desk. A short time ago I did an iPhoto import to look for a specific Icon so it imported thousands of stuff from the Sys Library, Library and User Library folders. At that time the whole system reached nearly 200°F with the fans running at full speed, 6000RPMs.

The left palm rest is still warm to the touch and my charge reads 99% and says it is plugged in.


What you are seeing is basically normal.

Apr 2, 2012 7:02 AM in response to tildaturtle

Different Mac models have temp sensors in different places. Mine has four sensors for battery temperature, one for the charger input and one for the palm rest. If yours has none of those, you'll have to compare all the sensor readouts for your machine and see which ones change the most when charging begins, then post both sets of readouts for those sensors.


Wait five minutes after starting charging to let the temperatures stabilize, and make sure the machine is completely idle — no apps running — when you take both sets of readings.

Apr 2, 2012 7:31 AM in response to eww

before charging:


HD - 38 DEGREES

CPU - 49 DEGREES

ENCLOSURE BASE - 35 DEGREES

ENCLOSURE BASE 2 - 35 DEGREES

ENCLOSURE BASE 3 - 32 DEGREES

HEATSINK B - 40 DEGREES

MEM BANK A1 - 40 DEGREES

MEM MODULE A1 - 49 DEGREES


when charging:


HD - 36 DEGREES

CPU - 51 DEGREES

ENCLOSURE BASE - 33 DEGREES

ENCLOSURE BASE 2 - 33 DEGREES

ENCLOSURE BASE 3 - 32 DEGREES

HEATSINK B - 40 DEGREES

MEM BANK A1 - 40 DEGREES

MEM MODULE A1 - 49 DEGREES

Apr 2, 2012 1:03 PM in response to tildaturtle

Then clearly the heat had little or nothing to do with charging, or else your battery was already fully charged when you recorded the second set of temperatures in your post above. When the battery is fully charged, no further charging takes place until the charge level falls below 93%, even if the charger is connected to the computer and plugged into a wall outlet.


None of the temperatures you've noted above is any cause for concern at all.

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my macbook pro gets very hot when charging

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