iMac HD temp sensor gone wild

viktorlsn

macrumors member
Hello, here is the situation:
My iMac temps were normally shown, and I was able of controlling it via iStat Menus. But now, when I open this and the app Temperature Monitor Lite, it iniatially shows the temp of hdd normally, it do change if I raise the fans up so I know this is not the problem. But after a while using the computer I noticed the temps of ONLY my HDD were not shown, it was like ---, and in iStat the temp keeps the same, no matter what I do, in ANY temp app. When I close and reopen the app, it again repeats the cycle.
Have anyone ran into this kind of problem before ? I have an iMAc 21.5inch 2.7ghz i5 and never upgraded the HD, only the RAM.
Any advice would be welcome.
 
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