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Original post by: Feisal Mansoor ,

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Ok very similar problem, water spill, local Apple SP wants to replace logic board. Apple Hardware test declares PFM006 error which is a thermal sensor error. What is basically happening is that kernel is stuck starting and stopping computer intermittently to allow it to cool. So it hogs all cpu resources. However computer is not running hot, SMC Fan controller shows 40-41 degrees Celsius.

In researching this I found someone on Apple Support Community who had a similar problem with the his MBP and taking it in to Apple Service (admittedly he hadn't spilled water on it) they replace his top case and this solved the problem. Otherwise this machine works flawlessly except for a pop up that says an USB port is drawing too much current but apparently this too is directly related to the thermal sensor malfunction.

Does anyone on this forum know if doing a similar repair will solve my MBA problem? i.e. replacing top case $100 part as opposed to logicboard $300 part... would solve it? Oerwise machine works flawlessly except for a pop up that says an USB port is drawing too much current but apparently this too is directly related to the thermal sensor malfunction.

Can the thermal sensor itself be changed?

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