2006 Core Duo Black Macbook - fan runs on high very easily.

Discussion in 'MacBook' started by ethereal45, Nov 7, 2012.

  1. ethereal45 macrumors regular

    Joined:
    Oct 12, 2007
    #1
    I have a Core Duo Black Macbook that I really like, except for the fact that the fan runs on high very very easily.

    I'm wondering if I just need to take it apart and clean out the fans with some compressed air, or if it's just a matter of the thermal paste going bad over time?

    The machine could probably use a reformat, but it's not because anything is jacking up the processor activity...I've checked that many times before.

    Any thoughts?
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    Is there an increase in temps associated with the higher fan speeds, or are they speeding up without increased heat? Use iStat Pro (free) or iStat Menus ($16) to get accurate readings of your battery, temps, fan speeds and much more.

    If the fans are spinning faster without high temps, try resetting the SMC.
     
  3. ethereal45 thread starter macrumors regular

    Joined:
    Oct 12, 2007
    #3
    I will try monitoring the temperatures. It seems to be in a response to increased processor load (i.e. watching YouTube videos). But sometimes it'll ramp up when I'm just browsing through the finder.
     
  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel)

    Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.

    It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch.

    Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis). iMacs have 3 fans with minimum speeds in the 800-1200 range. They will spin faster as needed to keep temps at a safe level.

    If your fans are spinning up without increased heat, try resetting the SMC.
    (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)

    The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best.

    Learn about the fans in your Mac
    Apple Portables: Operating temperature

    For Flash-related issues:
     

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