IMac High Fans - FIXED

Okay! This is my first post but I need to tell everyone what happened.
After I installed Snow Leopard my iMac fans were constantly running high. The temperature was also extremely hot. So, I called Apple. I live 150 miles away from the nearest Apple store so they sent a tech to my house. He replaced ALL three fans. About an hour after he left the problem reoccurred.
My next step was to take my computer to an authorized retailer which was about 45 minutes away. They kept the computer for two days. They replaced the power supply due to burn spots. I thought for sure they had fixed the heat problem. I was wrong. The problem still existed.
So, I drove 150 miles to the Apple store. They kept my computer for 6 days and then called me. They said they could not find ANYTHING wrong. I drove the 150 miles to pick the iMac up and then all the way back home. Sure enough, the problem still existed.
I was up until 2am and I finally found out what was wrong. There was an app in my preferences called "fan control". I removed this app and the problem was SOLVED. All from a third-party app. I guess Snow Leopard didn't support the fan control.
The process of my removing the "fan control":
1. In the preferences pane I right-clicked the fan control and removed it
2. I then went to my .../Library/StartupItems/... and deleted the fan control
3. Reboot the computer
4. Empty the trash (couldn't do this before because the files were still being used)
5. Reset the SMC
6. Do a PRAM reset (I did this twice...heard chime 3 times)
VIOLA! Mission Complete!

{quote:} I was up until 2am and I finally found out what was wrong. There was an app in my preferences called "fan control". I removed this app and the problem was SOLVED. All from a third-party app. I guess Snow Leopard didn't support the fan control.{quote}
Glad to hear that you solved your problem.
I just popped in to share that I've been using smcFanControl (firmware app.) on my Early Core Duo for about 3 years and it gracefully made the upgrades from Tiger, to Leopard, to Snow Leopard without a single problem or issue.
I'm thinking that the upgrade to Snow Leopard may have triggered the smcFanControl app. into turning back on, but why it resurfaced running at full tilt will probably remain a mystery. Perhaps it was just an old incompatible version or corrupt because it was migrated from a different system.
Dennis

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wmatt2010 wrote:
All of these seem to be down a bit. Can you recommend a better
(maybe more in-depth?) temperature monitoring application?
Nothing wrong with iStat Pro, but I use Bresink's HardwareMonitor.
It monitors temps, fan rpm, volts, amps, etc. and can display charts
of the measurement trends over time. IIRC, it cost about USD $10,
and you can try it out in advance with the free evaluation copy.
There's also a trimmed-down freeware version, TemperatureMonitor,
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http://www.bresink.com/osx/HardwareMonitor.html
http://www.bresink.com/osx/TemperatureMonitor.html
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Hi MGW,
Baby Boomer recommended that I check with you about our iMac G5 fan noise since you used to have the same model. For a reference as to what all has been suggested and done go to: http://discussions.apple.com/thread.jspa?messageID=9810894&#9810894
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http://www.theregister.co.uk/2007/05/03/danishconsumer_complaints_board_claim_ibookdefect/
http://www.forbrug.dk/presse/nyheder/pressekit/ibookg4/ibook-g4-english/
http://www.coreyarnold.org/ibook/
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http://www.putfile.com/pic.php?img=4757801
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You should not attempt to modify the fan speed of your computer. Apple's machines are finely calibrated. If you have a reason to believe the machine is failing to offer the right amount of speed, take it to Apple or an authorized repair shop for diagnosis. There are many reasons for slow down if that's the reason you were diagnosing in the first place, which my subscription FAQ covers*:
http://www.macmaps.com/Macosxspeed.html
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I also can save drafts now on both computers.
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Now that the problem is less, I feel i am wasting your time but will continue so maybe I can get those numbers back.
Two emails > AT&T email and gmail.
Apple's Mail program for email - yes, and gmail.
IMAP for both accounts.
Did not change mail configuration on MacBook.
The iMac and MacBook Pro have the same mail configuration except in Accounts/mailbox behaviours/store draft messages on the server was not marked on MacBook > it is now.
'Store junk messages on the server' was marked on one computer for gmail, but is unmarked on both now.
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On the MacBook Pro for gmail it is smpt.gmail.com (plus) my email address.
Rules/Add rule window, on the MacBook third line is 'Any Recipient', on the iMac third line is 'From."
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The last box on that line has the last address I sent an emil to (last night), on the iMac.
On the last line on iMac, no box was selicted for 'to mailbox' > I choose 'inbox' because it is on the MacBook Pro.
Now I have a Rule #1 and am not sure I should have because there was no rules marked when I took the computer in.
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Thank you so much,
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Learn about the fans in your Mac
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Thanks for using Apple Support Communities.
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Frank Moore wrote:
How do I give you the credit. It looks like I only gave you a Helpful credit instead of Correct Answer? The only correct option was in one of my replies under you correct answer. You gave the correct answer.
Oh well, no worries.

Possible solution iMac cooling fan stuck on high and loud

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Do a SMC reset and if that doesn't fix it back to the store you go!
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

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"I have a 4 year old iMAC G5"
If your model is NOT the iSight model, then you will be able to remove the back cover to clean off the accumulated dust from the fans. See Knowledge Base Article http://docs.info.apple.com/article.html?artnum=300205 iMac G5 DIY (Do-It-Yourself) Instructions for your model G5 iMac.
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IMac High Fans - FIXED

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