Mission critical systems such as automated teller machines, infant incubators, and Ethernet switches, require Fail-safe thermal management. Thermal management provides critical reliability functions to continuously maintain system temperature within a specified range. Mission Critical Systems require a customized Fail-Safe thermal management solution. In a generic PSoC 4 thermal management system, one PSoC 4 chip measures 4 temperatures including the air and CPU temperatures. It then drives 3 fans independently each to a precise speed. The system is redundant and reports to the central system controller by constantly monitoring the temperature sensor readings and adjusting the Fan RPM accordingly. PSoC 4 enables the designer to maintain the system temperature within a specified range.