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4mot/4/40000003:hdd-1221 error is on iMac?

Hi, can anyone tell me what a 4mot/4/40000003:hdd-1221 error is on an iMac and how it can be repaired?

iMac (27-inch Mid 2010), Mac OS X (10.6.8)

Posted on Sep 7, 2012 12:47 PM

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Posted on Sep 7, 2012 12:55 PM

That error usually indicates a problem with the fan that cools the hard drive. You will need to take your iMac to an Apple Store or authorized Apple service center to address this problem.


Regards.

5 replies

Sep 8, 2012 9:39 AM in response to RJThomas

Hi, I understand this to be the Hard Disk Drive fan Motor overspeed - the figure is the speed recorded with the default on my machine as 1200 rpm and the overspeed somewhere around 1320 if not working too hard (the fan should ramp up speed in any case against a calibrated speed/temperature curve, it just reports against what it is expecting, I guess) . I have had a similar issue with my iMac for over a year, if not more. As the fan is overspeed, it is just keeping the hard disk drive a bit cooler. I haven't bothered to get it fixed and don't see it as an issue. Incidently, on occasion, I have switched the machine off overnight and then done an Apple Hardware Test first thing in the morning and it has passed, and I don't lose any sleep over it.

4mot/4/40000003:hdd-1221 error is on iMac?

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