2.2, 2.4, 2.5, or 2.6 GHz Core 2 Duo processor

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Fans Running Fast All The Time

Hey everyone. Im having an issue I cant seem to resolve. I have a Macbook Pro A1226 and the fans are running fast constantly. Ive tried sms reset and NVRAM reset. I also unplugged the fans and replugged them. Ive looked at the activity monitor and no processes are using the CPU at more than 3%. Every package I download and read the sensors on the cpu or fans including istat pro, istat menu, smsfan control, etc. The only one that seems to read the cpu temp is Temperature Monitor which reads the temp at 29c. Ive ran AHT extended tests and it found no problems. Ive booted into safe mode and even tried reinstalling snow leopard and still no luck. Im guessing there is something wrong with the sensors so it just keeps running the fans constantly but I feel like the AHT would pick that up. Anyone have any ideas?

Answered! View the answer I have this problem too

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I have already done that. Any other answers than generic responses. I'm just gonna assume a faulty motherboard.

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Open it up and clean the fans and vents behind them. MacBook Pro 15" Core 2 Duo Models A1226 and A1260 Left Fan Replacement

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Forgot to mention I have already done that as well. I believe the issue is the sensors arent reporting to me the fan speeds so I am not even able to adjust the rpms. Any other ideas?

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Replace the thermal paste on the heat sink. Here's how: MacBook Pro 15" Core 2 Duo Models A1226 and A1260 Heat Sink Replacement

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I have just finished baking my motherboard after realizing that it was no good. I have reassembled and it runs fine except for the fan noise too. I blew out all the ports and there was lots of dust in them.

My one problem in reassembling was that the CMOS battery clip got broken when I tried re-attaching it to the MB. now I have to solder it back on. Do I need the CMOS battery at all?

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You can boot without cmos battery

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George Correia will be eternally grateful.
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