System Runs Hot
Quick Check
Symptoms | Quick Check | ||
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System Runs Hot | 1. | Verify that the vents on the bottom are free of | |
• System feels very hot |
| dust and other obstructions that might inhibit | |
• | Fan not operating |
| proper airflow through the system. |
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• | Fan running fast | 2. | Verify that the computer is not exposed to |
• | System is noisy |
| direct sunlight which may heat up the enclosure |
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| making it feel hot to the touch. |
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| 3. | Verify the computer is not running hotter than |
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| expected for normal operation. |
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| 4. | Launch Applications/Utilities/Activity Monitor. |
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| Determine whether an application or process is |
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| consuming a high percentage of CPU bandwidth. |
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| CPU intensive applications can cause the fans |
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| to run fast in order to maintain the proper |
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| internal system temperatures. If needed, quit the |
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| application or restart the system to resolve the |
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| issue. |
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| 5. | Reset SMC by unplugging power cord for ~15 |
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| seconds. |
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Deep Dive
Check | Result | Action | Code | |
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1. | Run Apple Hardware Test or | Yes | Suspect possible fan or |
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| Apple Server Diagnostics. Was |
| sensor error. . Check fan |
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| an error generated? |
| cable connection to the |
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| interconnect board. |
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| No | Go to step 2. |
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2. | Does noise sound like one or | Yes | Fan running fast. Reset SMC |
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| more fans running faster than |
| by disconnecting power cord |
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| expected? |
| for ~15 seconds then retest. If |
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| issue continues go to step 3. |
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| No | Go to step 3. |
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Mac mini (Late 2009) Symptom Charts — Mechanical 78 |
