Hi, make sure you flash the original firmware before applying this patch, may users had other overclocking mods which are
not allowing this one to work. You can either reset to factory or flash the autotune version for your miner.

There's no source code for this yet, I was able to disable fan check by modifying binary code and to overclock from the single board test.
Single board test code is available on bitmain github, and you apply same changes that I've applied on my video for bmminer.
The fan disable version is not made public, if offered only paid by PM or discord.

Good luck!