Fan is running constantly
I have a mid 2012 15 inch Retina Macbook Pro that was running absolutely fine till last 2 years. Just recently it is creating problem like the fans of the laptop run constantly even under normal cpu load and temperature. I have tried every possible guide and way to fix it but just couldn't solve it.
Then I ran the hardware test and found out the following error:
4SNS / 1 / 40000000 : Th2H - 127.875
After little bit of googling, I found out the error code referred to sensor related problems. Important to mention here, I live in Bangladesh where apple does not have a direct store but 1 - 2 authorised retailers and service providers. So I took my laptop to one of the authorised service providers w/o any delay and they told me I have to change my logic board as there's no other way to fix it. And changing the logic board will cost me hefty usd 1200 approximately which is a lot for me.
So can anyone suggest me what to do now. Is the error code really refers to replacing my logic board? Is there any way to skip the replacement? I mean is there any way to control fan by any app? What best I can do now?
I will highly appreciate if anyone gives me an honest opinion.