![]() Especially premature failure of the optical drive, internal hard drive AND early GPU failures. TOO hot for my comfort and too hot to not suspect that many iMac hardware component failures might be heat related. This brings my hard drive and CPU temps to under 40 degrees C (less than 100 degrees Fahrenheit). I have the RPMs set so my iMac's power supply and the GPU diode (these are the hottest running hardware components in an iMac) stay, more or less in the 45-50 degrees C range. SMC Fan control always keeps the fans spinning all the time. Unless your iMac is In a place that is prone to excessive dust and lint.įor temps, anything over 70 degrees C (160 degrees Fahrenheit or higher ) is bad. If you vacuumed the iMac recently, there really shouldn't be a big build up yet. I use a fan control app and do not set the RPMs for any of the fans any higher than 1500-1600 RPMs (the 2009 IMac fans usually default at 1100-1200 RPMs, so I only bring them up enough to keep the highest component temps below 60-65 degrees C. The next thing you can try and use (and you'll get a lot of subjective criticism from others here on what I am about to advise) is to download a software fan controller app, like SMC Fan Control, and manually set all of your iMac's fans RPMs to a speed which gets the temps to a more comfortable level without revving the fans too high, which can act as an internal vacuum, sucking in quicker, more dust, lint and dirt inside your newly cleaned out iMac. The easiest and quickest solution is to run a small desktop fan from behind the iMac and let the fan blow air on the backside aluminum panel to cool down your iMac. If, after a good clean out, you are still uncomfortable with the normal operating temps, as I am, you can do one and/or two things. If no joy in getting the temps down, call an Apple Store or Apple Authorised seller/repair/service center and ask about if they do interior cleaning of IMacs and its cost and schedule an appointment to get your Mac clean and free of interior lint and dust. Once done, re-setup and reconnect everything and power up your iMac and see if the temps go down. Vacuum out all of the various connection ports on the back of your Mac including the vent hole and grille that is visible through the iMac's support stand. Vacuum the long upper vent the is across the back of your iMac. Also, unscrew the RAM compartment cover and vacuum the dust out of the RAM area. ![]() Power down your iMac, disconnect the power and all your connected peripheral devices, lay your iMac screen down on a soft cloth of heavy toweling and using the vacuum's crevice tool(avoid using the vacuum's brush attachments as this may cause an electrical static discharge issue) and lightly (to avoid scratching your iMac's finish) vacuum out the vents underneath the display. You will only be pushing the dust, dirt and lint further into the iMac ![]() ![]() SInce you cannot break into the iMac to clean out the dust and dirt, I recommend the use of a vacuum cleaner with a hose and crevice tool attachment to suck, instead of blowing, the dirt out of your Mac. I suspect a lot of dust, dirt and lint may have built up inside of your iMac. The inside of your iMac could be full of dust, small particles of dirt and lint. ![]()
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