Introduction
If your Acer Aspire S3-391-6046 ultrabook is overheating, it might be a problem with the fan assembly. This is a guide for how to remove and replace it.
Tools
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            Use the tweezers to gently pull the small black plug out. 
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            After the plug is out, you should be able to pull the fan assembly out. 
 
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                            Conclusion
                          
                          To reassemble your device, follow these instructions in reverse order.