Mac Mini internal fan

The internal fan on my Mac Mini runs continually. It's two and a half years old and there's plenty of ventlation. Problem just started. Any thoughts. Thanks

Welcome To Apple Discussions!
At 2 1/2 years old, I assume this to be a G4 mini - one of the first ones?
It isn't that these were susceptible to this problem but the possible causes are somewhat different to the later Intel models.
First thing to do is ensure it's not a control problem. If it is a G4 mini, perform a PMU reset.
To reset the PMU
- Unplug all cables from the computer, including the power cord.
- Wait 10 seconds.
- Plug in the power cord while simultaneously pressing and holding the power button on the back of the computer.
- Let go of the power button.
- Press the power button once more to start up your Mac mini.
If that doesn't resolve this, firstly ensure it is not being caused by some errant process or application running and holding the CPU load unusually high. Run Activity Monitor (in Applications>Utilities) and check that the system is basically idle, even when the fan remains spinning. Also monitor the system and see if it takes longer for the fan to spin up to full speed from a cold start (after being powered down for a few hours or so) as opposed to a warm start, rebooting after a period of use.
If the fan runs when the system is shown to be idle and the time it takes to start running fast is longer from a cold start than a warm one, then it is possible you have a hardware issue. This might be nothing more than a loose CPU heatsink or rather more significant, such as the thermal pad on the base of the unit, (it is sandwiched between the underside of the logic board and the mini's baseplate and is used to wick heat away) suffering degradation. Either of these issues can be resolved by an approved service agent, but the thermal pad requires a complete disassembly and the pad replacing, while the CPU heatsink is a relatively easy matter.

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Someone once told me that the Time Port are router wanna bes.
They're entirely functional routers, and as APs. They're not particularly good choices as server gateways as they lack various server-oriented features; [here is what I look for with server gateways|http://labs.hoffmanlabs.com/node/1724].
It probably works fine as a wireless router for a house but not for a server. I guess I need to look at upgrading it, eh?
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I'm always impressed by those guys that wear the T-shirt with a picture of a screwdriver on it.
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I purchased an "Open box" Mac mini Intel Core Duo, 1.66Ghz, 2G ram, 80G HD and SD a few days ago from Fry's.
It runs beautifully except the fan is very loud compared to any Mac my family has ever had. It is so loud that we were thinking of putting it under the desk.
The fan runs constantly, and I mean all the time, at a high speed. You can really feel the air coming out the exhaust vents. The case is always cool to the touch as is the exhaust air.
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llulua
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eMac 1Ghz, iBook 500 dual usb, Mac mini 1.66Ghz Intel Core Duo 2g ram Mac OS X (10.4.8)
eMac 1Ghz, iBook 500 dual usb, Mac mini 1.66Ghz Intel Core Duo 2g ram Mac OS X (10.4.8)

Since you have 2 gigs of memory, my thoughts are that when the party (Fry's or the origianl purchaser) upgraded the memory, they neglected to reattach the wire at the front of the Mini under the IR receptor at the right front corner that regulates the fan speed. This wire must be unattached in order to upgrade the memory, and is probably why the original person brought it back, because of the fan noise resulting from failing to reattach the wire. If that wire is left unattached, the fan runs continually at high speed to protect the CPU and system in general. If you do not want to use a putty knife to open the Mini, take it back to Fry's and ask someone who is Mac savvy to open it and reattach the small plastic receptacle at the end of the wire into its socket at the right front of the machine. When I go to Fry's, I am always concerned because the employees allow people to pry keys off of the Apple notebooks, so don't expect that their employees to know or care about anything Mac.
Al PB 12" 1.5 Mac OS X (10.4.5)

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I need help with a broken fan. I broke the plastic plug off the fan and need help making sure i connect the wire to the correct blade. If someone is feeling really nice could you unscrew the fan, flip it over, and with the text on the sticker facing right side up(so that you can read it) tell me where each line connects. the top being number 1, below that being number 2 and so one. The connections on the logic board.... the closest to the ram being 1 the next being 2 and so on. I know this is a lot to ask, but it will be a huge help. Thank you in advance to anyone willing to take the time to do this.

Does > Cracking Open the Mac Mini 2011: Fan | 16 of 74
or Fan, Mid 2011 Mac mini 922-9953 (p/n 1009034) help?

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Mac Mini internal fan

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