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Hi.
When i got home from school, i discovered that my laptop fan doesn’t work. Nothing has happened to the computer. I haven’t dropped it, or bumped it into anything. My CPU reaches as much as 105°C when i’m browsing the internet.
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Have you actually opened up the Mac and verified the fan doesn’t spin or you think it doesn’t work because of the temperature ? If fan doesn’t spin indeed it may be the fan broke, although they seldom go bad or a resistor on the rail supplying power to it. Easiest thing to try would be replacing the fan. If that doesn’t work some testing would be needed and possibly a microsoldering repair.
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Yes, the fan indeed does not work.
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Grab a copy of TG Pro on the following link to accurately see just what your fan is doing and let us know your results:
https://www.tunabellysoftware.com/tgpro/
UPDATE
Replace the fan, here’s how:
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As i said, it reaches up to 105°C, but it is mostly stable at around 90-100°C. Since this website isn't a good service, i'm unable to attach files to this comment.
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I recently experienced and resolved this issue on a 13-inch mid 2012 MacBook Pro, so I'm sharing the steps I took for the sake of posterity.
I have a 2012 MacBook Pro running a clean install of Linux. Right after installation, I noticed the laptop was prone to speed throttling and overheating.
My first step was to run Apple Diagnostics by holding the D key on startup. This returned error codes PPF003 and PPF004, which according to Apple indicate a fault with the fan.
I also used a third party tool to manually control the fan from Linux, and this reported the fan was intermittently spinning up and not cooling the laptop sufficiently. The temperature sensors would quickly reach 105°C, causing the issues with overheating.
First, I opened up the rear of the laptop and cleaned the accumulated dust, particularly around the cooling vents.
I then took apart the fan, cleaned it and applied a drop of sewing machine lubricant to the shaft of the electric motor.
After reassembly, I ran Apple Diagnostics again, and this time it did not report any faults related to the fan.
The fan now spins at normal speeds and the third party tool in Linux reports temperatures of between 70°C and 76°C during regular use with no throttling of performance.
This was originally intended as a temporary fix while I planned to source for a replacement fan. However, after a month of regular use, I feel confident enough in the fix to share my solution.
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