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Dear friends,
I have a imac 21,5" Mid 2011. Suddenly, the CPU fan start to run at full speedy and non stop.
I realized the apple hardware test and the error 4MOT/4?40000003: HDD-1358 appears.
What this code means?
Thanks for your help,
MTE17
That code means the Hard Drive sensor is reporting trouble with the fan or heat sensor...
Have you blown the dust out of the intakes lately?
What temperatures does this App report?
This App can be used to speed up the fans, all my iMacs would be dead without it.
Never ever ever drop fan speeds below the speed that the Mac itself is calling for.
MacFansControl…
The SMC is not getting RPM feedback from the Fan. Which is causing an SMC fault, which is causing the SMC to run the fan at full speed.
I would first recheck the CPU fan wiring and connection to the logic board. Then if that doesn't help, I would try replacing the Fan.
I already have the MacFansControl installed. The CPU fan is measuring 0, but it is in maximum speed.
I can not even control the CPU fan speed. Recently, i cleaned all the fans.
Nothing happened
I already try, but did not solve the problem.
Thank you.
Try setting the CPU fan to 2200 RPM for a test.
I checked everything and the problem continues. I will try to replace it.
Thank you
CPU Fan Non Stop
