Mac mini fan always full speed


How to Troubleshoot Your Mac’s Fan

He then measured the impedance of the fan control circuit of the fan and the motherboard and was able to deduce based on similar low voltage fan controller designs that the missing component was either a low or no voltage jumper component. As such he then just bridged the two pads with small piece of wire and my mac mini has been working flawlessly for 2 years now! As Lui has measured this to be 0. My friend doesn't believe that this component would have been a capacitor.

Show 7 more comments. It would have been even more helpful if I didn't already find the answer on my Mac! It has an SSD in it, and even though the body was completely cool, the fan was running at maximum speed, which is quite distracting. It was a plain text file called "slowfan".

If the fans in your Mac run at full speed when you turn it on

All I had to do was drag and drop it into Terminal, after I read it -- don't run code you don't know what it will do. You need to create the "Apps" folder first, in your User Home folder. I downloaded a fan control program from http: My problem when I pulled off a socket from my board when removing the plug attached to my optical drive thermal sensor while replacing the battery.

The sensor program allowed me to choose among different sensors by listing their current operating temp and what component they were sensing. Sadly, the software solution is not a good long term fix. There are people with micro soldering skills that might be able to fix the damage. I would recommend you give them a try.


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The web site that led me to this software also offered that apple had a fan control app, that did the same thing , but it was developed for the iMac which employs more than 1 fan and therefore wasn't ideal for the mini. The forum is on Macgurus. The software I suggested has been used since at least on both macs and pcs with no negative feedback I could find. If you know otherwise I am interested. For the time being I am watching the included temperature samplings and fan speed analog while I decide on soldering equipment to tackle the job myself.

I have some experience soldering communication cables for our earlier years of networking CNC machines with our engineering and programming departments. I am also aware that some companies build fixes into their systems but don't necessarily advertise them so that they don't have to employ highly trained technicians to repair their products. Sadly, from experience working on Mac systems over 20 years this band-aid solution is not ideal. Apple fan control is via hardware SMC services which works via the core OS and not controllable by the user. Apple does not offer any fan control application to access it.

Apple uses thermal sensors and tachometers built into the fans to monitor both the temp of different things running in your system and how fast the fans need to run to remove the heat buildup dynamically.

Mac Mini Fans at Full Speed - Ars Technica OpenForum

I would recommend you use a good monitoring app that allows you to see visually what the sensors and fans are doing. I like this one: Temperature Gauge Pro. While it also allows you to set the fans I discourage its use for that.

Re: Mac Mini Fan running at full speed all the time.

I re read the forum I mentioned above and found that I had misread the part about apple. I will try the program that you suggested in order to compare it to the info my program is giving me, however I am still looking at soldering stations. I guess I am so used to 5 year obsolescence using PC's that having a system that is still useful at this time makes me brave about digging into it. Before you warm up the soldering station, first figure out what you need to fix. Often the issue is just a loose wire connector or a damaged part. Show 2 more comments.

Archipella Studios asga. Macmini with SMC Fan Control and iStat menu monitoring fan speed and temperatures and it locked into 5, rpm today and would not quit. I removed the plastic base while stilled plugged in and running and was shocked to find a thick layer of dust similar to the lint you'd find in a clothes dryer covering the perforated metal screen. I removed the dust by hand and sprayed the rest with compressed air and the fan speed dropped to normal immediately.

You should plan for a yearly clean up dusting out your system. You also may want to look at where your system is. Do you have a shedding dog or rug? Do you tend to run the vacuum around a lot? You maybe need to address the area as well. I also don't recommend using fan over-ride software as time has proved they end up doing more harm than good! My Mac mini server fan speed 5xxx RPM is solved by swapping temp sensor soket between the 2 HD after a overheat shutdown problem and showed a exhaust reading error.

Try to fix temp sensor first while you have a noise fan. Robert Bush rjbush. I have a similar problem. The fan "revs" and then slows down. After about 9 seconds, it revs again. I tried a restart and that helped temporarily. Do I need to replace the fan? Select a Language: Drag the application icon to your Applications folder, then fire it up.

The CPU will pretty much always be the warmest thing on your Mac, and the most important temperature to check—but it can be interesting to check the other sensors. The minimum, current, and maximum speed are shown in that order. The same goes if you see a low CPU temperature—say, around 45—and the fans are running at full speed.

Mac Mini Fan Running Full Speed at startup

Turn the fan up and see if you can hear anything. If not, your fan has some issues. I really do not recommend disabling the automatic fan control: Think your fan might be broken?

10 Answers

Are the fans in your Mac or MacBook roaring away at full speed, making it sound like your computer is getting ready to take off? Here are some simple things you can try that might save you a trip to the Apple Store. See also: Five Apple products that are headed for the scrapheap. First of all, it may just be normal. If you are running a resource-heavy application such as Photoshop, or have a browser with loads of tabs open, then the fans might very well be just doing their job.

After all, without them, your Mac would quickly wither and die. Alternatively, it's possible that an application -- or maybe even the operating system -- has crashed and is going rogue. The quickest way to fix this is with a reboot. Another heavy load for MacBooks is using external monitors. Because these stress the GPU it means that the fans run more often. I also recommend installing a temperature monitor.

These range from free tools such as Intel's Power Gadget to commercial apps such as TG Pro , which can not only log temperatures but also allow you to take control of the system fans manually. TG Pro is awesome too because it will show you the temperature of all the separate sensors and there are a lot of sensors, ranging from several built into the CPU to a palm rest temperature sensor and can warn you if any of the sensors or fans are defective. Information on how to do that can be found here.

fuztelstital.tk If this doesn't seem to work the first time, I recommend doing it two or three times. Don't ask me why, I've just learned from experience that doing it the once doesn't always work. Oh, so you're still reading. That means that your fans are still whining away and you're getting ready to head out to the Apple Store, right? Well, I do have one more trick that you can try.

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