After having read the kernel log again, I am almost sure it's a PSU issue, and thus increasing the fan speed won't really fix it, you could try to clean the PSU but I suggest replacing it with a working one just to see if it works, don't jump into conclusions and waste money buying a new PSU until it's confirmed.

As for where can you buy those PSUs in Canada, I can't help you with that sadly, I live a few thousand miles away  , but IIRC Steamtyme is in Canada and he has been involved in mining for long, maybe he knows of good sources there.