If anyone know anything about the S19 psu shutting down because of heat. Please leave some info. Thanks.
Of course!. Nearly all PSUs have temp protection and they will shut-down to protect themselves, a very common issue that miners face on a daily bases is their PSUs shutting down due to heat mostly caused by dust and/or not enough space between the PSU's and the wall/other miners,
The very back of the psu next to the miners exhaust fans is probably hot
What's behind the PSUs exhaust is what matters most, but still a bit of spacing between the miners will help cool down the PSUs a bit.