Chosen Solution
I followed the guide over here: MacBook Air 11" Mid 2011 Upper Case Replacement and replaced my keyboard for my 2011 macbook air 11". Everything is working great except for one blatant issue. The fan is constantly on full blast, even when there’s nothing open and it’s cooled down. It seems like the mechanism for detecting when the fan needs to come on, and at what speed, stopped working. I must have botched something up at some point. I just can’t figure out what. I opened it up again to make sure I reinstalled everything correctly and there aren’t any loose connections anywhere. Has anybody had this issue? What can I do to troubleshoot? I’ve been dealing with this for about 10 months now…lol I really need to get this figured out soon because I’ll be selling it.
I would start off by installing some software to monitor the thermal sensors and the fan. I like Temperature Gauge which you can download from the App store. There are others apps out there that are just as good. Post an image of what it is showing. I suspect you may in fact have a sensor issue Vs a fan issue but without more information its hard to tell. Update The temps look OK, for now lets focus on the fan connector and the ribbon cable. You still may need a better tool so you can see the fan sensor. Can you take a good hires picture of it. Also, lets try doing a SMC reset as well and see if that clears things. Here’s the Apple TN on how to do it: Intel-based Macs: Resetting the System Management Controller (SMC)
