I have been experiencing the issue where the fans on a new Mac Book Pro 2020 with intel processor do not kick in thereby causing frequent overheating issues and consequent shutdowns. I reset the SMC, restarted with diagnostics and installed the mac fan control free software, the fans are now running and I am keeping an eye on the temperature of the cores. I had been told that incorrectly applied thermal paste was supposedly the issue but this is not a case of fans constantly, just the opposite.